Whyarethewindowssodirty?Becaus

--Why are the windows so dirty?
--Because we_________them for a long time.
A. have cleaned B. haven't cleaned C. didn't clean

登录免费查看答案和解析

相关试题

— Betty was really pretty blue this morning. But now, she’s much better.
— .

A．Oh, that’s kind of you	B．Congratulations
C．Oh, I’m glad to hear that	D．It’s my pleasure

收藏答案/解析

— Does your aunt usually walk the dog in the park?
— Yeah, bad weather stops her.

A．when	B．since
C．unless	D．if

收藏答案/解析

— Who would you like to see you off at the airport?
— ______________. Just say “goodbye” at home.

A．Somebody	B．Anybody
C．Everybody	D．Nobody

收藏答案/解析

Our school had to the soccer games because of the bad weather, which made students frustrated.

A．put on	B．put off
C．put up	D．put down

收藏答案/解析

It’s foggy today. I’m not sure the highway will close soon. Let’s set off earlier.

A．whether

B．when

C．how

D．why

收藏答案/解析