Wemustdosomethingtothefactorie

We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.

A．keep

B．protect

C．permit

D．prevent

登录免费查看答案和解析

相关试题

31. To keep safe _______ an earthquake, you should remain at a spot in your room where nothing may fall on you.

A．in search of

B．in advance of

C．in terms of

D．in case of

收藏答案/解析

30. —Now the weight. Only 115. You’d better put on a few pounds.
—Well, actually, I ________ like a horse.

A．ate

B．was eating

C．have been eating

D．will eat

收藏答案/解析

29. I can hardly remember any occasions _______ I get caught in a traffic jam in our town.

A．which

B．that

C．where

D．when

收藏答案/解析

28. —Where have you been all day?
—I _______ some former classmates and I couldn’t get back until it was dark.

A．have met

B．met

C．would meet

D．had met

收藏答案/解析

27. The process of producing electricity may also give out CO2, _______ you heat your house with electricity instead of charcoal.

A．even if

B．as long as

C．as if

D．as soon as

收藏答案/解析