Cho hỗn hợp E gồm ba chất X, Y và ancol propylic. X, Y là hai amin kế tiếp trong cùng dãy đồng đẳng; phân tử X, Y đều có hai nhóm NH₂ và gốc hidrocacbon không no; M_X < M_Y. Khi đốt cháy hết 0,1 mol E cần vừa đủ 0,551 mol O₂, thu được H₂O, N₂ và 0,354 mol CO₂. Phần trăm khối lượng của Y trong E 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 thet best fits each of the numbered blanks from 24 to 28:

 According to the European Pizza-Makers’ Association, making a good pizza is not a straight forward skill to learn. The ingredients seem very (24) _______: flour, yeast, water and a bit of salt. But water and flour can easily make glue and anyone who has eaten a (25) _______ quality pizza will know how bad it can make your stomach feel. “In Italy, 70% of pizza makers could improve on their product, not to (26) _______ all the pizza makers around the world who serve uneatable meals”, says Antonio Primiceri, the Association's founder. He has now started a pizza school in an attempt to save the reputation of this traditional dish. As part of a/ an (27) _______ course, the students at Mr Primiceri's school are taught to avoid common mistakes, produce a good basic mixture, add a tasty topping and cook the pizza properly. Test the finished pizza by breaking the crust, advises Mr Primiceri: “If the soft part inside the pizza is white, clean and dry, it's a good pizza. If it is not like this, the pizza will upset your stomach. You will feel (28) _______ full and also thirsty”. In Italy alone, the pizza industry has an annual turnover of more than $12 billion. Mr Primiceri estimated that there are 10,000 jobs in pizza restaurants waiting to be filled by those with real skills. “If you are a good pizza cook, you will never be without a job”, he says.

Question 24:       

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

 According to the European Pizza-Makers’ Association, making a good pizza is not a straight forward skill to learn. The ingredients seem very (24) _______: flour, yeast, water and a bit of salt. But water and flour can easily make glue and anyone who has eaten a (25) _______ quality pizza will know how bad it can make your stomach feel. “In Italy, 70% of pizza makers could improve on their product, not to (26) _______ all the pizza makers around the world who serve uneatable meals”, says Antonio Primiceri, the Association's founder. He has now started a pizza school in an attempt to save the reputation of this traditional dish. As part of a/ an (27) _______ course, the students at Mr Primiceri's school are taught to avoid common mistakes, produce a good basic mixture, add a tasty topping and cook the pizza properly. Test the finished pizza by breaking the crust, advises Mr Primiceri: “If the soft part inside the pizza is white, clean and dry, it's a good pizza. If it is not like this, the pizza will upset your stomach. You will feel (28) _______ full and also thirsty”. In Italy alone, the pizza industry has an annual turnover of more than $12 billion. Mr Primiceri estimated that there are 10,000 jobs in pizza restaurants waiting to be filled by those with real skills. “If you are a good pizza cook, you will never be without a job”, he says.

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 thet best fits each of the numbered blanks from 24 to 28:

 According to the European Pizza-Makers’ Association, making a good pizza is not a straight forward skill to learn. The ingredients seem very (24) _______: flour, yeast, water and a bit of salt. But water and flour can easily make glue and anyone who has eaten a (25) _______ quality pizza will know how bad it can make your stomach feel. “In Italy, 70% of pizza makers could improve on their product, not to (26) _______ all the pizza makers around the world who serve uneatable meals”, says Antonio Primiceri, the Association's founder. He has now started a pizza school in an attempt to save the reputation of this traditional dish. As part of a/ an (27) _______ course, the students at Mr Primiceri's school are taught to avoid common mistakes, produce a good basic mixture, add a tasty topping and cook the pizza properly. Test the finished pizza by breaking the crust, advises Mr Primiceri: “If the soft part inside the pizza is white, clean and dry, it's a good pizza. If it is not like this, the pizza will upset your stomach. You will feel (28) _______ full and also thirsty”. In Italy alone, the pizza industry has an annual turnover of more than $12 billion. Mr Primiceri estimated that there are 10,000 jobs in pizza restaurants waiting to be filled by those with real skills. “If you are a good pizza cook, you will never be without a job”, he says.

Question 25:       

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

 According to the European Pizza-Makers’ Association, making a good pizza is not a straight forward skill to learn. The ingredients seem very (24) _______: flour, yeast, water and a bit of salt. But water and flour can easily make glue and anyone who has eaten a (25) _______ quality pizza will know how bad it can make your stomach feel. “In Italy, 70% of pizza makers could improve on their product, not to (26) _______ all the pizza makers around the world who serve uneatable meals”, says Antonio Primiceri, the Association's founder. He has now started a pizza school in an attempt to save the reputation of this traditional dish. As part of a/ an (27) _______ course, the students at Mr Primiceri's school are taught to avoid common mistakes, produce a good basic mixture, add a tasty topping and cook the pizza properly. Test the finished pizza by breaking the crust, advises Mr Primiceri: “If the soft part inside the pizza is white, clean and dry, it's a good pizza. If it is not like this, the pizza will upset your stomach. You will feel (28) _______ full and also thirsty”. In Italy alone, the pizza industry has an annual turnover of more than $12 billion. Mr Primiceri estimated that there are 10,000 jobs in pizza restaurants waiting to be filled by those with real skills. “If you are a good pizza cook, you will never be without a job”, he says.

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 thet best fits each of the numbered blanks from 24 to 28:

 According to the European Pizza-Makers’ Association, making a good pizza is not a straight forward skill to learn. The ingredients seem very (24) _______: flour, yeast, water and a bit of salt. But water and flour can easily make glue and anyone who has eaten a (25) _______ quality pizza will know how bad it can make your stomach feel. “In Italy, 70% of pizza makers could improve on their product, not to (26) _______ all the pizza makers around the world who serve uneatable meals”, says Antonio Primiceri, the Association's founder. He has now started a pizza school in an attempt to save the reputation of this traditional dish. As part of a/ an (27) _______ course, the students at Mr Primiceri's school are taught to avoid common mistakes, produce a good basic mixture, add a tasty topping and cook the pizza properly. Test the finished pizza by breaking the crust, advises Mr Primiceri: “If the soft part inside the pizza is white, clean and dry, it's a good pizza. If it is not like this, the pizza will upset your stomach. You will feel (28) _______ full and also thirsty”. In Italy alone, the pizza industry has an annual turnover of more than $12 billion. Mr Primiceri estimated that there are 10,000 jobs in pizza restaurants waiting to be filled by those with real skills. “If you are a good pizza cook, you will never be without a job”, he says.

Question 27:      

Read the following pasage 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:

Our classes take place for three hours every morning from Monday to Friday. The (31)_________ class size is twelve and the average is ten. We use modern methods (32)_________ teaching  and learning, and the school has a language laboratory, a video camera and recorders. You will only be successful in improving your English; however, if you work hard and practise speaking English as much as you can. You will take a short (33)_________ in English as soon as you arrive. In this way, we can put you in a (34)_________ at the most suitable level. The emphasis is on oral communication practice in a wide (35)_________ of situations at the advanced knowledge. You will learn how to use language correctly and appropriately when you talk to native speakers. In addition, you will develop such study skills as reading efficiently, writing articles and reports, and note-taking from books and lectures.  

Question 34:           

Read the following pasage 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:

Our classes take place for three hours every morning from Monday to Friday. The (31)_________ class size is twelve and the average is ten. We use modern methods (32)_________ teaching  and learning, and the school has a language laboratory, a video camera and recorders. You will only be successful in improving your English; however, if you work hard and practise speaking English as much as you can. You will take a short (33)_________ in English as soon as you arrive. In this way, we can put you in a (34)_________ at the most suitable level. The emphasis is on oral communication practice in a wide (35)_________ of situations at the advanced knowledge. You will learn how to use language correctly and appropriately when you talk to native speakers. In addition, you will develop such study skills as reading efficiently, writing articles and reports, and note-taking from books and lectures.  

Question 33:         

Read the following pasage 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:

Our classes take place for three hours every morning from Monday to Friday. The (31)_________ class size is twelve and the average is ten. We use modern methods (32)_________ teaching  and learning, and the school has a language laboratory, a video camera and recorders. You will only be successful in improving your English; however, if you work hard and practise speaking English as much as you can. You will take a short (33)_________ in English as soon as you arrive. In this way, we can put you in a (34)_________ at the most suitable level. The emphasis is on oral communication practice in a wide (35)_________ of situations at the advanced knowledge. You will learn how to use language correctly and appropriately when you talk to native speakers. In addition, you will develop such study skills as reading efficiently, writing articles and reports, and note-taking from books and lectures.  

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:

Some years ago, my daughter was studying English at a university on the south coast. One evening she phoned to tell me that what she really wanted to do was looking (31) ________the world, so she was looking into the possibility of working in another country. She had seen several (32) ________ in the newspaper for student teachers of English abroad, and she was interested in one in Italy, which she was desperate to visit. She decided that this would be a good way to achieve her ambition, so she was writing to apply for the job. The reply took a long time to arrive, but eventually she received a letter asking if she would go for an interview in London the following week. She was so excited that she immediately got in touch with the school owner and agreed to attend the interview. She was determined that nothing would prevent her (33) ________ doing what she had set out to do. A few days before the interview she had a very strange dream in which she gave birth to a beautiful baby. She was a little nervous and (34) ________about the dream and phoned to ask me what I thought it might mean. As I knew something about dreams, I was able to assure her that it only symbolized her (35) ________to do well in the interview. 

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:

Some years ago, my daughter was studying English at a university on the south coast. One evening she phoned to tell me that what she really wanted to do was looking (31) ________the world, so she was looking into the possibility of working in another country. She had seen several (32) ________ in the newspaper for student teachers of English abroad, and she was interested in one in Italy, which she was desperate to visit. She decided that this would be a good way to achieve her ambition, so she was writing to apply for the job. The reply took a long time to arrive, but eventually she received a letter asking if she would go for an interview in London the following week. She was so excited that she immediately got in touch with the school owner and agreed to attend the interview. She was determined that nothing would prevent her (33) ________ doing what she had set out to do. A few days before the interview she had a very strange dream in which she gave birth to a beautiful baby. She was a little nervous and (34) ________about the dream and phoned to ask me what I thought it might mean. As I knew something about dreams, I was able to assure her that it only symbolized her (35) ________to do well in the interview. 

Question 33: