We ____ on this project for four hours. Let’s have a rest.A．are workingB．have b

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We ____ on this project for four hours. Let’s have a rest.

A．are working

B．have been working

C．worked

D．had worked

答案

解析

略

举一反三

— ____ you read the newspaper?
— Yes. I ____ it on the bus while I was on my way to work.

A．Have; read

B．Did; read

C．Have; have read

D．Did; have read

题型：不详难度：| 查看答案

--- What ______ when I phoned you?
--- I ______ my work, and I was about to go out．

A．have you done; finished	B．were you doing; have finished
C．did you do; had just finished	D．were you doing; had just finished

题型：不详难度：| 查看答案

We were listening closely to the lecture yesterday evening when suddenly the light _______.

A．had been gone out	B．was going out
C．was gone out	D．went out

题型：不详难度：| 查看答案

-Have you known him for a long time?
-Yes, since he ________ here after graduation.

A．comes

B．came

C．has come

D．had come

题型：不详难度：| 查看答案

So far this year we ______ a fall in house prices by between 5 percent and 10 percent.

A．saw

B．see

C．had seen

D．have seen

题型：不详难度：| 查看答案