Câu hỏi: Population growth rates vary among regions and even among countries within the same region.

A. fluctuate

B. stay unchanged

C. restrain

D. remain unstable

Câu 1: Certain courses are compulsory; others are optional.

A. voluntary

B. free

C. pressure

D. mandatory

Câu 2: They started building the house in January.

A. begin

B. finish

C. commence

D. continue

Câu 3: You did a beautiful thing in helping those poor children.

A. meaningful

B. good

C. terrible

D. positive

Câu 4: She must be very strong to carry such a weight on her back.

A. weak

B. musculous

C. sick

D. healthy

Câu 5: The doctor advised Peter to give up smoking.

A. stop

B. continue

C. finish

D. consider

Câu 6: The Germany’s war hysteria has accounted for its people’s hostility towards foreigners.

A. disease

B. ceremony

C. malaria

D. friendliness