Tìm giá trị thực của tham số $m$ để hệ phương trình $\left\{\begin{array}{l}2x+3y+4=0\\ 3x+y-1=0\\ 2mx+5y-m=0\end{array}\right.$ có duy nhất một nghiệm.

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:

The warming of the Pacific Ocean has created weather pattern--------31-------- strongly affect the world. When the water is warm, the amount of rainfall in Indonesia and the surrounding regions decreases. Australia could ------32-------- experience a drought in many parts. On the other hand, Chile (which borders the Pacific Ocean) is preparing for severe rainstorms. In Pakistan and northwestern India, the weather pattern makes the rainy season weaker and makes the area much drier. This happening is called El Nino and is used ------33------ weather forecasters to make long-range weather predictions. They also know that El Nino will bring unusually rain to the southwestern part of the United States and make the central part of the country drier at the same time. According to research, weather forecasters ------34------- know about the coming weather with certainty. Now everything has become completely different. El Nino itself used to be predictable. It would occur every two to seven years. But now this weather pattern is becoming more frequent. We cannot say when and how often tornadoes or cyclones occur. Scientists are unsure of the reason for this ------35-------- on the global scale either.  

Question 34:

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:

The warming of the Pacific Ocean has created weather pattern--------31-------- strongly affect the world. When the water is warm, the amount of rainfall in Indonesia and the surrounding regions decreases. Australia could ------32-------- experience a drought in many parts. On the other hand, Chile (which borders the Pacific Ocean) is preparing for severe rainstorms. In Pakistan and northwestern India, the weather pattern makes the rainy season weaker and makes the area much drier. This happening is called El Nino and is used ------33------ weather forecasters to make long-range weather predictions. They also know that El Nino will bring unusually rain to the southwestern part of the United States and make the central part of the country drier at the same time. According to research, weather forecasters ------34------- know about the coming weather with certainty. Now everything has become completely different. El Nino itself used to be predictable. It would occur every two to seven years. But now this weather pattern is becoming more frequent. We cannot say when and how often tornadoes or cyclones occur. Scientists are unsure of the reason for this ------35-------- on the global scale either.  

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:

Engineers have been dreaming of an underwater link between Britian and France since 1802. Finally, in 1994 the Channel Tunnel ( nickname ”the Chunnel” by the English) was officially opened. This fifteen million dollar project took seven years to complete. It is 50km long and built 45 metres under the seabed. The trains which go through the Chunnel can travel at up to 300km/h due to the(31)…… electrical system. The journey from London to Paris via the Chunnel takes just three hours. It is also handy for drivers since they can load their cars onto the trains. They don't need to book in(32)……… as trains depart every few minutes. However, while on the train, there isn't much to do and many criticise the Chunnel for this. Unlike the ferries, there is no duty-free shopping, no video game parlour or refreshment stand(33).……… can you look outside and enjoy the view. As a result, many would find the Chunnel(34)……and would take the ferry(35)……  

Question 34:

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:

Engineers have been dreaming of an underwater link between Britian and France since 1802. Finally, in 1994 the Channel Tunnel ( nickname ”the Chunnel” by the English) was officially opened. This fifteen million dollar project took seven years to complete. It is 50km long and built 45 metres under the seabed. The trains which go through the Chunnel can travel at up to 300km/h due to the(31)…… electrical system. The journey from London to Paris via the Chunnel takes just three hours. It is also handy for drivers since they can load their cars onto the trains. They don't need to book in(32)……… as trains depart every few minutes. However, while on the train, there isn't much to do and many criticise the Chunnel for this. Unlike the ferries, there is no duty-free shopping, no video game parlour or refreshment stand(33).……… can you look outside and enjoy the view. As a result, many would find the Chunnel(34)……and would take the ferry(35)……   

Question 35:

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

THE FIRST WOMAN SCIENTIST Hypatia was born in Alexandria, in Egypt, in 370 A.D. For many centuries, she was the only woman scientist to have a place in the history books. Hypatia’s father was director of Alexandria University, and he (31) ________ sure his daughter had the best education available. This was unusual, as most women then had few (32) ________ to study. After studying in Athens and Rome, Hypatia returned to Alexandria where she began teaching mathematics. She soon became famous (33) ________ her knowledge of new ideas. We have no copies of her book, but we know that she wrote several important mathematical works. Hypatia was also interested in technology and invented several scientific tools to help with her work. At the (34) ________, many rulers were afraid of science, and anyone connected with it was in danger. One day in March 415, Hypatia (35) ________ attacked in the street and killed.

Question 35:            

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

THE FIRST WOMAN SCIENTIST Hypatia was born in Alexandria, in Egypt, in 370 A.D. For many centuries, she was the only woman scientist to have a place in the history books. Hypatia’s father was director of Alexandria University, and he (31) ________ sure his daughter had the best education available. This was unusual, as most women then had few (32) ________ to study. After studying in Athens and Rome, Hypatia returned to Alexandria where she began teaching mathematics. She soon became famous (33) ________ her knowledge of new ideas. We have no copies of her book, but we know that she wrote several important mathematical works. Hypatia was also interested in technology and invented several scientific tools to help with her work. At the (34) ________, many rulers were afraid of science, and anyone connected with it was in danger. One day in March 415, Hypatia (35) ________ attacked in the street and killed.  

Question 34:          

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:

All relationships go through difficult times. In the past, when married couples had problems they usually didn’t (31) _________. They had to either (32) _________ with each other or continue to live together in an unhappy relationship. Getting divorced wasn’t an option for most people due to economic and social reasons. Some people believe that this wasn’t such a bad thing. They say that relationships require hard work and (33) _________. “If a relationship is going to last a lifetime, you have to keep working at it,” says Doreen, who is celebrating her fiftieth wedding anniversary this year. “It isn’t all roses and romance. No one perfect all of the time. These days young people give up when there’s the (34) _________ argument.” Experts agree that communication is key. The most important thing is to keep talking. How many times have you heard yourself say to somebody, “If only you’d listen!” or “I wish you wouldn’t do that!” The truth is, the (35) ______ couples talk, the better their relationship can be.  

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:

All relationships go through difficult times. In the past, when married couples had problems they usually didn’t (31) _________. They had to either (32) _________ with each other or continue to live together in an unhappy relationship. Getting divorced wasn’t an option for most people due to economic and social reasons. Some people believe that this wasn’t such a bad thing. They say that relationships require hard work and (33) _________. “If a relationship is going to last a lifetime, you have to keep working at it,” says Doreen, who is celebrating her fiftieth wedding anniversary this year. “It isn’t all roses and romance. No one perfect all of the time. These days young people give up when there’s the (34) _________ argument.” Experts agree that communication is key. The most important thing is to keep talking. How many times have you heard yourself say to somebody, “If only you’d listen!” or “I wish you wouldn’t do that!” The truth is, the (35) ______ couples talk, the better their relationship can be.  

Question 34:

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

One of the hottest topics on the international development agenda is how to harness the power of International Monetary Fund for the benefit of developing countries. What is sometimes called “the death of distance”, brought about by the Internet, allow professional services such as (31) ________ education and training to be provided easily and quickly to (32) ________ areas. Some of the gains can be seen in countries as diverse as India and Morocco, where innovations range from (33) ________ government announcements to local craftsmen selling their wares to a (34)________ market. But already a huge and expanding digital divide is opening up between developed and developing nations. The major tasks facing world leaders at present is to supply everybody on the planet with clean water, basic education and the drugs needed to fight preventable diseases. Installing a modem in every classroom and linking us to (35) ________ must be a lesser criteria at least.  

Question 34:        

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

One of the hottest topics on the international development agenda is how to harness the power of International Monetary Fund for the benefit of developing countries. What is sometimes called “the death of distance”, brought about by the Internet, allow professional services such as (31) ________ education and training to be provided easily and quickly to (32) ________ areas. Some of the gains can be seen in countries as diverse as India and Morocco, where innovations range from (33) ________ government announcements to local craftsmen selling their wares to a (34)_______ market. But already a huge and expanding digital divide is opening up between developed and developing nations. The major tasks facing world leaders at present is to supply everybody on the planet with clean water, basic education and the drugs needed to fight preventable diseases. Installing a modem in every classroom and linking us to (35) ________ must be a lesser criteria at least.  

Question 35: