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 45 to 54.

POLAR BEARS

Polar bears are in danger of dying out. (45) _________ some other endangered animals, it’s not hunters that are the problem, it’s climate change. Since 1979, the ice cap at the Arctic Circle where the polar bears live has (46) _________ in size by about 30 percent. The temperature in the Arctic has slowly been (47) _________ and this is (48) _________ the sea ice to melt, endangering the polar bears’ home.

The polar bears’ main (49) _________ of food are the different types of seal found in the Arctic. They catch them by waiting next to the air holes the seals have (50) _________in the ice. (51) _________ the bears are very strong swimmers, they could never catch seals in the water. This means that the bears (52) _________ do rely on the ice to hunt.

Polar bears also need sea ice to travel. They can (53) _________ a huge territory and often swim from one part of the ice to another. They have been known to swim up to 100km, but when there is less ice, they may have to swim further and this can (54) _________ fatal to the bears. A number of bears have drowned in the last few years and scientists believe that it is because they were not able to reach more sea ice before they became too tired and couldn’t swim any further.

Điền vào ô 50

A. placed

B. set

C. brought

D. made

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

The education system is a mirror that reflects the culture.

A. points

B. explains

C. Shows

D. gets

Este X (C₄H₈O₂) thỏa mãn các điều kiện sau:

X + H₂O → H + , t o  Y₁ + Y₂                             

Y₁ + O₂ → x t , t o  Y

Phát biểu sau đây đúng?

A. X là metyl propionat.                                   

B. Y₁ là anđehit axetic.  

C. Y₂ là axit axetic.

D. Y₁ là ancol metylic.

Cho các phát biểu sau về crom và hợp chất của crom:

1. Dung dịch kali đicromat có màu da cam.

2. Crom bền với nước và không khí do có lớp màng oxit bền bảo vệ.

3. Crom (III) oxit là một oxit lưỡng tính.

4. Crom (VI) oxit tác dụng với nước tạo hỗn hợp hai axit.

5. Hợp chất crom (VI) có tính oxi hóa mạnh.

6. Tính khử của Cr³⁺ chủ yếu thể hiện trong môi trường axit. Số phát biểu đúng là:

A.  4                     

B.  5                    

C.  6                     

D.  3

Số liệu về các cạnh của bạn có đúng ko vậy. mik giải ra rồi nhưg số căn ko à

Mark the letter (A, B, C or D) on your answer sheet to indicate the word or phrase that is OPPOSITE in meaning to the underlined part in each of the sentences from 24 to 25

That is a well-hehaved boy whose behaviour has nothing to complain about.”

A. behaving nice

B. good behavior

C. behaving improperly

D. behaving cleverly