Câu hỏi: Professor Berg was very interested in the diversity of cultures all over the world. (Mark the letter A, B, C, or D to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.)

A. variety

B. changes

C. conservation

D. number

Câu 1: It is not easy to ________ our beauty when we get older and older.

A. develop

B. maintain

C. gain

D. collect

Câu 2: I believe that he was concerned ______ all those matters which his wife mentioned.

A. with

B. over

C. upon

D. above

Câu 3: _______ is the study of the Earth's physical features and the people, plants, and animals that live in different regions of the world.

A. Science

B. Geography

C. History

D. Technology

Câu 4: It's hard work looking _______ three children all day.

A. after

B. up

C. to

D. through

Câu 5: You should _______ more attention to what your teacher explains.

A. make

B. get

C. set

D. pay

Câu 6: He was _______ when I had those problems and said whatever I did he would stand by me.

A. supportive

B. exciting

C. busy

D. dull