﹣Why are the windows so dirty?﹣Because we __________ them for a long time.A. hav

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

试题分析: 句意：为什么窗户那么脏？因为我们很长时间没清洁了。for a long time很长时间，for加时间表一段时间，用于现在完成时，窗户脏的原因是没有清洁，故选B.

举一反三

–There great changes in Nanjing in the past few years.
–I agree. And some more lines of the underground will be in service this year.

A．will be

B．are

C．were

D．have been

题型：不详难度：| 查看答案

--Don’t smoke here. Look at the sign please.
–Sorry, I _________it.

A．don’t notice

B．can’t notice

C．won’t noticing

D．didn’t notice

题型：不详难度：| 查看答案

—Is there any ink in the bottle, Linda?
—No, we ________out of it already.

A．have run

B．will run

C．ran

D．are running

题型：不详难度：| 查看答案

The students told us _____________last summer vacation.

A．where did they camp	B．where will they camp
C．where they camped	D．where they will camp

题型：不详难度：| 查看答案

hey, Alice. You___ on the phone a moment ago. But you weren’t here and I took a message for you.
Oh? I was in the library.

A．are wanted

B．were wanted

C．are called

D．have called

题型：不详难度：| 查看答案