Tại nơi có gia tốc trọng trường là 9,8 m/s², một con lắc đơn dao động điều hòa cùng tần số với một con lắc lò xo dao động điều hòa có vật nặng khối lượng 0,5 kg và lò xo có độ cứng 10 N/m. Chiều dài con lắc đơn là:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 23:

Schools in the United States have not always had a large number of libraries. As recently as 1958 about half of the public schools in the United States had no libraries at all. The (19)_______of public school libraries increased dramatically when the federal government passed the Elementary and Secondary Education Act of 1965, which provided funds for school districts to improve their education programs and facilities, including their libraries. (20) _______, many educators claim that since the legislation was passed federal spending has not increased sufficiently to meet the rising cost of new library technologies such as computer databases and Internet access. Because the federal government provides only limited funds to schools, individual school districts (21)______ on funds from local property taxes to meet the vast majority of public schools tend to reflect the financial capabilities of the communities in which they are located. Districts in wealthy suburbs often have fully staffed libraries (22)________ abundant resources, spacious facilities, and curricular and instructional support. In (23) __________, school districts in many poor areas house their libraries in ordinary classrooms or in small rooms. The libraries in such areas are generally staffed by volunteers, who organize and maintain books that are often out-of-date, irrelevant, or damaged. 

Question 20:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 23:

Schools in the United States have not always had a large number of libraries. As recently as 1958 about half of the public schools in the United States had no libraries at all. The (19)_______of public school libraries increased dramatically when the federal government passed the Elementary and Secondary Education Act of 1965, which provided funds for school districts to improve their education programs and facilities, including their libraries. (20) _______, many educators claim that since the legislation was passed federal spending has not increased sufficiently to meet the rising cost of new library technologies such as computer databases and Internet access. Because the federal government provides only limited funds to schools, individual school districts (21)______ on funds from local property taxes to meet the vast majority of public schools tend to reflect the financial capabilities of the communities in which they are located. Districts in wealthy suburbs often have fully staffed libraries (22)________ abundant resources, spacious facilities, and curricular and instructional support. In (23) __________, school districts in many poor areas house their libraries in ordinary classrooms or in small rooms. The libraries in such areas are generally staffed by volunteers, who organize and maintain books that are often out-of-date, irrelevant, or damaged. 

Question 22:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 23:

Schools in the United States have not always had a large number of libraries. As recently as 1958 about half of the public schools in the United States had no libraries at all. The (19)_______of public school libraries increased dramatically when the federal government passed the Elementary and Secondary Education Act of 1965, which provided funds for school districts to improve their education programs and facilities, including their libraries. (20) _______, many educators claim that since the legislation was passed federal spending has not increased sufficiently to meet the rising cost of new library technologies such as computer databases and Internet access. Because the federal government provides only limited funds to schools, individual school districts (21)______ on funds from local property taxes to meet the vast majority of public schools tend to reflect the financial capabilities of the communities in which they are located. Districts in wealthy suburbs often have fully staffed libraries (22)________ abundant resources, spacious facilities, and curricular and instructional support. In (23) __________, school districts in many poor areas house their libraries in ordinary classrooms or in small rooms. The libraries in such areas are generally staffed by volunteers, who organize and maintain books that are often out-of-date, irrelevant, or damaged. 

Question 21:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 23:

Schools in the United States have not always had a large number of libraries. As recently as 1958 about half of the public schools in the United States had no libraries at all. The (19)_______of public school libraries increased dramatically when the federal government passed the Elementary and Secondary Education Act of 1965, which provided funds for school districts to improve their education programs and facilities, including their libraries. (20) _______, many educators claim that since the legislation was passed federal spending has not increased sufficiently to meet the rising cost of new library technologies such as computer databases and Internet access. Because the federal government provides only limited funds to schools, individual school districts (21)______ on funds from local property taxes to meet the vast majority of public schools tend to reflect the financial capabilities of the communities in which they are located. Districts in wealthy suburbs often have fully staffed libraries (22)________ abundant resources, spacious facilities, and curricular and instructional support. In (23) __________, school districts in many poor areas house their libraries in ordinary classrooms or in small rooms. The libraries in such areas are generally staffed by volunteers, who organize and maintain books that are often out-of-date, irrelevant, or damaged. 

Question 23:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 24 to 28:

A long and happy marriage is something that many people wish for, but finding the right partner is (24) _______ more difficult than you might imagine. A friend of mine, Susan had not been very successful in her attempt to find the perfect partner, and she was beginning to lose heart and feel rather depressed. One day she happened to hear someone (25) _______ about a computer dating agency which could help you to find the ideal partner. Susan immediately (26) _______ an appointment to see someone at the agency, then waited to see what would happen. The agency arranged a meeting with a “suitable” partner at the local railway station a week later, although I (27) _______ her not to go. My friend arrived a few minutes early but could see no one who matched the appearance of the man in the photograph she had been sent. She noticed a man waiting under the station clock and (28) _______ a bunch of flowers. But there was no one else around. Suddenly the man started chatting to her and, after a while, asked her if she would like to go and have a coffee. Not until much later did they come to the conclusion that they had both been waiting for each other! When they had both recovered from the shock, they decided that the computer had been right after all!

Question 26:        

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 24 to 28:

A long and happy marriage is something that many people wish for, but finding the right partner is (24) _______ more difficult than you might imagine. A friend of mine, Susan had not been very successful in her attempt to find the perfect partner, and she was beginning to lose heart and feel rather depressed. One day she happened to hear someone (25) _______ about a computer dating agency which could help you to find the ideal partner. Susan immediately (26) _______ an appointment to see someone at the agency, then waited to see what would happen. The agency arranged a meeting with a “suitable” partner at the local railway station a week later, although I (27) _______ her not to go. My friend arrived a few minutes early but could see no one who matched the appearance of the man in the photograph she had been sent. She noticed a man waiting under the station clock and (28) _______ a bunch of flowers. But there was no one else around. Suddenly the man started chatting to her and, after a while, asked her if she would like to go and have a coffee. Not until much later did they come to the conclusion that they had both been waiting for each other! When they had both recovered from the shock, they decided that the computer had been right after all!

Question 27:       

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 24 to 28:

A long and happy marriage is something that many people wish for, but finding the right partner is (24) _______ more difficult than you might imagine. A friend of mine, Susan had not been very successful in her attempt to find the perfect partner, and she was beginning to lose heart and feel rather depressed. One day she happened to hear someone (25) _______ about a computer dating agency which could help you to find the ideal partner. Susan immediately (26) _______ an appointment to see someone at the agency, then waited to see what would happen. The agency arranged a meeting with a “suitable” partner at the local railway station a week later, although I (27) _______ her not to go. My friend arrived a few minutes early but could see no one who matched the appearance of the man in the photograph she had been sent. She noticed a man waiting under the station clock and (28) _______ a bunch of flowers. But there was no one else around. Suddenly the man started chatting to her and, after a while, asked her if she would like to go and have a coffee. Not until much later did they come to the conclusion that they had both been waiting for each other! When they had both recovered from the shock, they decided that the computer had been right after all!

Question 28:        

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 32 to 36:

School exams are, generally speaking, the first kind of tests we take. They find out (32) _____ much knowledge we have gained. But do they really show how intelligent we are? After all, isn’t it a fact that some people who are very successful academically don’t have any common sense? Intelligence is the speed at which we can understand and react to new situations and it is usually tested by logic puzzles. (33) _____ scientists are now preparing advanced computer technology that will be able to “read” our brains, for the present, tests are still the most popular ways of measuring intelligence. A person’s IQ is their intelligence (34) _____is measured by a special test. The most common IQ tests are run by Mensa, an organization that was founded in England in 1946. By 1976 it had 1,300 members in Britain. Today there are 44,000 Britain and 100,000 worldwide, (35) _____ in the US. People talking the tests are judged in relation to an average score of 100, and those (36) _____ score over 148 are entitled to join Mensa. This works out at 2% of the population. Anyone from the age of six can take the tests. All the questions are straightforward and most people can answer them if allowed enough time. But that’s the problem – the whole point of the tests is that they’re against the clock.

Question 36:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

In Part Three of the Speaking Section you work together with a partner. You have to do a single task which usually lasts about 3 minutes. One possible task is “problem solving”, which means you have to look at some visual information and then (31)__ the problem with your partner. You may be shown photos, drawings, diagrams, maps, plans, advertisements or computer graphics and it is (32)__ that you study them carefully. If necessary, check you know exactly what to do by politely asking the examiner to (33)__ the instruction or make them clearer. While you are doing the task, the examiner will probably say very (34)__ and you should ask your partner questions and make suggestions if he or she is not saying much. If either of you have any real difficulties, the examiner may decide to step in and help. Normally, however, you will find plenty to say, which helps the assessor to give you a fair mark. This mark depends on your success in doing the task by (35)__ with your partner, which includes taking turns in giving opinions and replying appropriately, although in the end it may be possible to “agree to disagree”.

Question 35: 

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

In Part Three of the Speaking Section you work together with a partner. You have to do a single task which usually lasts about 3 minutes. One possible task is “problem solving”, which means you have to look at some visual information and then (31)__ the problem with your partner. You may be shown photos, drawings, diagrams, maps, plans, advertisements or computer graphics and it is (32)__ that you study them carefully. If necessary, check you know exactly what to do by politely asking the examiner to (33)__ the instruction or make them clearer. While you are doing the task, the examiner will probably say very (34)__ and you should ask your partner questions and make suggestions if he or she is not saying much. If either of you have any real difficulties, the examiner may decide to step in and help. Normally, however, you will find plenty to say, which helps the assessor to give you a fair mark. This mark depends on your success in doing the task by (35)__ with your partner, which includes taking turns in giving opinions and replying appropriately, although in the end it may be possible to “agree to disagree”.

Question 31: