---The window must have taken you quite a lot of time that day. --- You are righ
题型：不详难度：来源：
---The window must have taken you quite a lot of time that day.
--- You are right. They ________ for weeks.| A．haven’t been cleaned | B．hadn’t been cleaned | | C．didn’t’ clean | D．haven’t cleaned |
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答案
| B |
解析
这题考查时态语态，窗户是被擦干净，所以用被动式，只能在AB之间选，根据句意：--那天擦窗户一定花了你很多时间，--对，它们几个星期没擦了。因为那天擦过了，所以用过去完成时。选B。 |
举一反三
The leaders of the company are having a meeting to discuss where the new office building __.| A．should situate | B．should be situated | C．should be lied | D．was located |
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---Why did you stop writing?
--- I _____ my writing paper.| A．ran out of | B．have been used up | | C．have used up of | D．have run out |
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Up to now, large quantities of food ____ to Africa to save the starving people.| A．is sent | B．has been sent | C．have been sent | D．are sent |
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---The food here is nice enough.
---My friend ______ me a right place.| A．introduces | B．introduced | C．had introduced | D．was introducing |
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—I’m going to attend your lecture at 9∶30 tomorrow morning.
—I regret to tell you that. When you arrive, it will have ended and I ________ questions with my students.| A．would discuss | B．will discuss | | C．will be discussing | D．am discussing |
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