Cho hai ma trận . $A=\left[\begin{array}{ccc}1& 1& 0\\ 1& 0& 1\\ 0& 1& 1\end{array}\right],B=\left[\begin{array}{ccc}0& 1& -1\\ 2& 3& \mathrm{ }\mathrm{ }\mathrm{ }1\end{array}\right]$ Ma trận X thỏa $\mathrm{ }XA=B$ 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 1 to 5:

Chimpanzees in the wild like to snack on termites, and youngsters learn to fish for them by pocking long sticks and other (1)……tools into the mounds that large groups of termites build. Researchers found that (2)…………average female chimps in the Gombe National Park in Tanzania learnt how to do termite fishing at the age of 31 months, more than two years earlier than the males. The females seem to learn by watching mothers. Researcher Dr. Elisabeth V. Lonsdorf, director of field conservation at the Lincoln Park Zoo in Chicago, said that it is (3)…………to find that, when a young male and female are near a mound, she’s really focusing on termite fishing and he’s spinning himself round (4)………circles. Dr Landsdorf and colleagues are studying chimpanzees at the zoo with a new, specially created termite mound, filled with mustard (5)……than termites. 

 Question 2:

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 1 to 5:

Chimpanzees in the wild like to snack on termites, and youngsters learn to fish for them by pocking long sticks and other (1)……tools into the mounds that large groups of termites build. Researchers found that (2)…………average female chimps in the Gombe National Park in Tanzania learnt how to do termite fishing at the age of 31 months, more than two years earlier than the males. The females seem to learn by watching mothers. Researcher Dr. Elisabeth V. Lonsdorf, director of field conservation at the Lincoln Park Zoo in Chicago, said that it is (3)…………to find that, when a young male and female are near a mound, she’s really focusing on termite fishing and he’s spinning himself round (4)………circles. Dr Landsdorf and colleagues are studying chimpanzees at the zoo with a new, specially created termite mound, filled with mustard (5)……than termites. 

 Question 3:

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 1 to 5:

Chimpanzees in the wild like to snack on termites, and youngsters learn to fish for them by pocking long sticks and other (1)……tools into the mounds that large groups of termites build. Researchers found that (2)…………average female chimps in the Gombe National Park in Tanzania learnt how to do termite fishing at the age of 31 months, more than two years earlier than the males. The females seem to learn by watching mothers. Researcher Dr. Elisabeth V. Lonsdorf, director of field conservation at the Lincoln Park Zoo in Chicago, said that it is (3)…………to find that, when a young male and female are near a mound, she’s really focusing on termite fishing and he’s spinning himself round (4)………circles. Dr Landsdorf and colleagues are studying chimpanzees at the zoo with a new, specially created termite mound, filled with mustard (5)……than termites. 

 Question 1:

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 1 to 5:

Chimpanzees in the wild like to snack on termites, and youngsters learn to fish for them by pocking long sticks and other (1)……tools into the mounds that large groups of termites build. Researchers found that (2)…………average female chimps in the Gombe National Park in Tanzania learnt how to do termite fishing at the age of 31 months, more than two years earlier than the males. The females seem to learn by watching mothers. Researcher Dr. Elisabeth V. Lonsdorf, director of field conservation at the Lincoln Park Zoo in Chicago, said that it is (3)…………to find that, when a young male and female are near a mound, she’s really focusing on termite fishing and he’s spinning himself round (4)………circles. Dr Landsdorf and colleagues are studying chimpanzees at the zoo with a new, specially created termite mound, filled with mustard (5)……than termites. 

 Question 4:

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 1 to 5:

Chimpanzees in the wild like to snack on termites, and youngsters learn to fish for them by pocking long sticks and other (1)……tools into the mounds that large groups of termites build. Researchers found that (2)…………average female chimps in the Gombe National Park in Tanzania learnt how to do termite fishing at the age of 31 months, more than two years earlier than the males. The females seem to learn by watching mothers. Researcher Dr. Elisabeth V. Lonsdorf, director of field conservation at the Lincoln Park Zoo in Chicago, said that it is (3)…………to find that, when a young male and female are near a mound, she’s really focusing on termite fishing and he’s spinning himself round (4)………circles. Dr Landsdorf and colleagues are studying chimpanzees at the zoo with a new, specially created termite mound, filled with mustard (5)……than termites. 

Question 5:

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:   

There are several changes in the procedure for employees ___5___ wish to apply for vacant positions within the company. These changes make it much easier for in-house employees to fill vacancies that occur. First, __6__ most important difference is that employees will now be notified of all available positions before the positions are advertised for the general public. Accordingly, all in-house candidates will be interviewed before we see any out-side candidates, and we will offer the job to outside candidates only if no current employees are able to fill the position. Second, under the new procedure, in-house employees can be hired even if they don’t __7__ all job requirements. Under our old policy, in-house employees had to meet all job qualifications in order to obtain the vacant position. Now, however, employees who have proven themselves dedicated __8__ the company will be hired for a vacant position even if they are lacking some minor qualifications; training will be provided. A third change involves recommendations. Form now on, employees do not need to be recommended for an in-house position before they __9__. Instead, employees may apply as soon as they are aware of the vacancy. The remaining procedures and policies (those regarding increase in pay, interview procedure, and hiring approval) remain the same.

Question 5:

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 first each of the numbered blank from 1 to 5:  

American folk music originated with (1) _____ people at a time when the rural population was isolated and music was not (2)______spread by radio, records, or music video. It was (3)_____by oral traditional and is noted for its energy ,humor, and emotional impact. The major source of aerly American folk songs was music from the Bristish Isles, but songs from Africa as songs of the American Indians have significant part in its heritage. Later settler from other countries also contributed songs. In the nineteenth century, composer Steven Foster wrote some of the most enduringly popular of all American songs, (4)______soon became part of the folk tradition. Beginning in the 1930s, Woody Guthrie gained great popularity by adapting melodies and lyrics and supplying new ones as well. In the 1950s and 1960s, singer–composers such as Peter Seeger, Bob Dylan, Joan Baez continued this tradition by urban folk music. Many of these songs deal (5)_____important social issue, such as racial intergration and the war in Vietnam.

Question 2:

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 first each of the numbered blank from 1 to 5:  

American folk music originated with (1) _____ people at a time when the rural population was isolated and music was not (2)______spread by radio, records, or music video. It was (3)_____by oral traditional and is noted for its energy ,humor, and emotional impact. The major source of aerly American folk songs was music from the Bristish Isles, but songs from Africa as songs of the American Indians have significant part in its heritage. Later settler from other countries also contributed songs. In the nineteenth century, composer Steven Foster wrote some of the most enduringly popular of all American songs, (4)______soon became part of the folk tradition. Beginning in the 1930s, Woody Guthrie gained great popularity by adapting melodies and lyrics and supplying new ones as well. In the 1950s and 1960s, singer–composers such as Peter Seeger, Bob Dylan, Joan Baez continued this tradition by urban folk music. Many of these songs deal (5)_____important social issue, such as racial intergration and the war in Vietnam.

Question 3:

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 first each of the numbered blank from 1 to 5:  

American folk music originated with (1) _____ people at a time when the rural population was isolated and music was not (2)______spread by radio, records, or music video. It was (3)_____by oral traditional and is noted for its energy ,humor, and emotional impact. The major source of aerly American folk songs was music from the Bristish Isles, but songs from Africa as songs of the American Indians have significant part in its heritage. Later settler from other countries also contributed songs. In the nineteenth century, composer Steven Foster wrote some of the most enduringly popular of all American songs, (4)______soon became part of the folk tradition. Beginning in the 1930s, Woody Guthrie gained great popularity by adapting melodies and lyrics and supplying new ones as well. In the 1950s and 1960s, singer–composers such as Peter Seeger, Bob Dylan, Joan Baez continued this tradition by urban folk music. Many of these songs deal (5)_____important social issue, such as racial intergration and the war in Vietnam.

Question 1:

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 first each of the numbered blank from 1 to 5:  

American folk music originated with (1) _____ people at a time when the rural population was isolated and music was not (2)______spread by radio, records, or music video. It was (3)_____by oral traditional and is noted for its energy ,humor, and emotional impact. The major source of aerly American folk songs was music from the Bristish Isles, but songs from Africa as songs of the American Indians have significant part in its heritage. Later settler from other countries also contributed songs. In the nineteenth century, composer Steven Foster wrote some of the most enduringly popular of all American songs, (4)______soon became part of the folk tradition. Beginning in the 1930s, Woody Guthrie gained great popularity by adapting melodies and lyrics and supplying new ones as well. In the 1950s and 1960s, singer–composers such as Peter Seeger, Bob Dylan, Joan Baez continued this tradition by urban folk music. Many of these songs deal (5)_____important social issue, such as racial intergration and the war in Vietnam.

Question 4: