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.

Few people now realize the reality of global warming and its effects on the world’s climate. Many scientists (31) ______ the blame for recent natural disasters on the increase in the world’s temperatures and are convinced that, more than ever before, the Earth is at (32) ______ from the forces of the wind, rain and sun. According to them, global warming is making extreme weather events, such as hurricanes and droughts, even more severe and causing sea levels all around the world to rise.

         Environmental groups are putting pressure on governments to take action to reduce the amount of carbon dioxide which is given (33) ______ by factories and power plants, thus attacking the problems at its source. They are in  (34) ______ of more money being spent on research into solar, wind and wave energy devices, which could then replace existing power (35) ______. Some scientists, however, believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow, we would have to wait several hundred years to notice the results. Global warming, it seems, is to stay.

Điền vào số (34)

A. request

B. suggestion

C. belief

D. favor

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.

My first job was a sales assistant at a large department store. I wanted to work part-time, because I was still studying at university and I was only able to work a few nights a week.

I came across the advertisement in the local newspaper. I remember the interview as though it were yesterday. The (19) ______ manager sat behind a large desk. He asked me various questions which surprised me because all I wanted was to work in sales. An hours later, I was told that I had got the job and was given a contract to go over. I was to be trained for ten days before I took my post. Also, as a member of staff, I was (20) ______ to some benefits, including discounts.

When I eventually started, I was responsible (21) ______ the toy section. I really enjoyed it there and I loved demonstrating the different toys. I was surprised at how friendly my colleagues were, too. They made working there fun even when we had to deal with customers (22) ______ got on our nerves. (23) ______, working there was a great experience which I will never forget

Điền ô số 22

A. which

B. why

C. when

D. who

Phát biểu nào sau đây là đúng ?

A. Amino axit là hợp chất có tính lưỡng tính

B. Trong môi trường kiềm, đipetit mạch hở tác dụng được với Cu(OH)₂ cho hợp chất màu tím

C. Trong một phân tử tetrapeptit mạch hở có 4 liên kết peptit

D. Các hợp chất peptit kém bền trong môi trường bazơ nhưng bền trong môi trường axit

Cho các phát biểu sau:

(a) Đốt cháy hoàn toàn este no, đơn chức, mạch hở luôn thu được số mol CO₂ bằng số mol H₂O.

(b) Trong hợp chất hữu cơ nhất thiết phải có cacbon và hiđro.

(c) Những hợp chất hữu cơ có thành phần nguyên tố giống nhau, thành phần phân tử hơn kém nhau một hay nhiều nhóm CH₂ là đồng đẳng của nhau.

(d) Dung dịch glucozơ bị khử bởi AgNO₃ trong NH₃ tạo ra Ag.

(e) Saccarazơ chỉ có cấu tạo mạch vòng.

Số phát biểu đúng là

A. 5.

B. 3.

C. 4.

D. 2.