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 think it's important to listen to both sides of the argument.

A. hear

B. speak

C. advise

D. pay attention to

Câu 2: She was always very hard-working at school.

A. studious

B. learned

C. lazy

D. attentive

Câu 3: The earth is being threatened and the future looks bad.

A. done

B. made

C. protected

D. varied

Câu 4: Mr. Smith’s new neighbors appear to be very friendly.

A. amicable

B. inapplicable

C. hostile

D. futile

Câu 5: You can find the answer to almost any question in cyberspace.

A. require

B. comment

C. answer

D. sentence

Câu 6: It must be difficult to cope with three small children and a job.

A. easy

B. free

C. confusing

D. tricky