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

A. done

B. made

C. protected

D. varied

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: 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 4: His policies were beneficial to the economy as a whole.

A. harmless

B. crude

C. harmful

D. good

Câu 5: The whole conference was totally disorganized - nobody knew what they were supposed to be doing.

A. someone

B. nothing

C. no one

D. something

Câu 6: Using Facebook, you can post update sayings about your life every day.

A. locate

B. displace

C. establish

D. put up