Câu hỏi: They started building the house in January.

A. begin

B. finish

C. commence

D. continue

Câu 1: She must be very strong to carry such a weight on her back.

A. weak

B. musculous

C. sick

D. healthy

Câu 2: I've put the cake on a high shelf where he can't get at it.

A. low

B. untouchable

C. far

D. difficult to reach

Câu 3: Certain courses are compulsory; others are optional.

A. voluntary

B. free

C. pressure

D. mandatory

Câu 4: The Germany’s war hysteria has accounted for its people’s hostility towards foreigners.

A. disease

B. ceremony

C. malaria

D. friendliness

Câu 5: 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 6: Soon after it was born, the calf got up and tried to stand on its shaky legs.

A. appeared

B. died

C. joined

D. celebrated