The box _____. Better call in a mechanic(修理工). A isn’t open B hasn’t been
题型：不详难度：来源：
The box _____. Better call in a mechanic(修理工).
A isn’t open B hasn’t been open C isn’t be open D won’t open |
答案
| D |
解析
| open在这里用作不及物动词，所以不用被动语态。 |
举一反三
The doorbell had been ringing for several minutes before it ______.
A answered B had answered C was answering D was answered |
| The notice ______ “No smoking”. A is told B reads C tells D is read |
-- Look! Everything here is under construction.
--- What’s the pretty small house that ______ for?| A．is being built | B．has been built | | C．is built | D．is building |
|
I first met Mr. Smith in America. He ______ at Stanford University then.| A．studied | B．has studied | | C．is studying | D．was studying |
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It’s been over a year since I ______ back from the countryside.| A．come | B．came | C．will come | D．had come |
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