The disappearance (A) of one (B) or several species may result in (C) the lost (D) of biodiversity.

A. alike

B. like

C. likely

D. as

A. You don’t have to smoke in this building.

B. You are allowed to smoke in this building.

C. You must not smoke in this building.

D. Smoking in this building is permitted.

A. air pollution

B. the effect of air pollution

C. those who are affected by air pollution

D. the respiratory diseases

A. recommendation

B. information

C. fiction

D. interest

A. It is said that computers can replace books entirely.

B. Computers are thought to can replace books entirely.

C. Computers can replace books entirely like some people think.

D. Replacing books by computers is very necessary.

A. fulfillment

B. eradication

C. formation

D. addition