--Why are the windows so dirty?--Because we_________them for a long time.A. have

题型：不详难度：来源：

--Why are the windows so dirty?
--Because we_________them for a long time.
A. have cleaned B. haven"t cleaned C. didn"t clean

答案

解析

句意：窗户为什么这么脏？——因为我们有很久不打扫他们了。结合语境可知下文描述的是从过去一直持续到现在的动作，否定语气，故用现在完成时态否定形式，选B。

举一反三

Today’s young people can’t live without smart phones. They keep their hands on the phones whenever they go, even while they_______meals.

A．had

B．will have

C．are having

D．were having

题型：不详难度：| 查看答案

If Nancy ______ the exam, she will go to Australia for English study.

A．pass

B．passed

C．passes

D．will pass

题型：不详难度：| 查看答案

It _____ last week that the haze(雾霾)in Beijing caused many problems.

A．reports

B．reported

C．is reported

D．was reported

题型：不详难度：| 查看答案

—Your shoes are so old. Why don’t you buy a new pair?
—Because I ______ all my money on an MP5.

A．spend

B．have spent

C．am spending

D．was spending

题型：不详难度：| 查看答案

Alice interviewed some people and asked them about ____ on Father" s Day .
A. what they do B. what they did. C. what they will do .

题型：不详难度：| 查看答案