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: I have a modest little glass fish tank where I keep a variety of small fish.

A. moderate

B. limited

C. narrow

D. large

Câu 2: You did a beautiful thing in helping those poor children.

A. meaningful

B. good

C. terrible

D. positive

Câu 3: 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

Câu 4: They started building the house in January.

A. begin

B. finish

C. commence

D. continue

Câu 5: She was always very hard-working at school.

A. studious

B. learned

C. lazy

D. attentive

Câu 6: She went to live in another state after the break-up of her marriage.

A. loneliness

B. anniversary

C. celebrity

D. divorce