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:

She was always very hard-working at school.

A. studious

B. learned

C. lazy

D. attentive

Câu 2:

The earth is being threatened and the future looks bad.

A. done

B. made

C. protected

D. varied

Câu 3:

The Red Cross is an international humanitarian agency dedicated to reducing the sufferings of wounded soldiers, civilians and prisoners of war.

A. worry and sadness

B. pain and sorrow

C. loss

D. happiness

Câu 4:

Barry seems happy enough working for himself.

A. funny

B. satisfied

C. upset

D. interested

Câu 5:

Certain courses are compulsory; others are optional.

A. voluntary

B. free

C. pressure

D. mandatory

Câu 6:

In the first two decades of its existence, the cinema developed rapidly.

A. leisurely

B. slowly

C. weakly

D. shortly