Years ago we didn"t know this, but recent science ______ that people who don"t s

题型：不详难度：来源：

Years ago we didn"t know this, but recent science ______ that people who don"t sleep well soon get ill.

A．showed

B．has shown

C．will show

D．is showing

答案

解析

考查动词的时态。根据句子中的recent science可以知道句子中“含有过去发生的动作”对现在产生的影响。所以答案应该用现在完成时。

举一反三

The policeman"s attention was suddenly caught by a small box which ______ placed under the Minister"s car.

A．has been

B．was being

C．had been

D．would be

题型：不详难度：| 查看答案

Susan decided not to work on the program at home because she didn’t’ want her parents to know what she __________.

A．has done

B．had done

C．was doing

D．is doing

题型：不详难度：| 查看答案

According to the art dealer, the painting ______ to go for at least a million dollars.

A．is expected

B．expects

C．expected

D．is expecting

题型：不详难度：| 查看答案

— The food here is nice enough.

— My friend ______ me a right place.

A．introduces

B．introduced

C．had introduced

D．was introducing

题型：不详难度：| 查看答案

--Do you want a lift home?

---It’s very kind of you, but I have a much late in the office. I overslept this morning because my morning clock _______.

A．doesn’t go off

B．won’t gone

C．wasn’t going off

D．didn’t go on

题型：不详难度：| 查看答案