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题目
题型:不详难度:来源:
The doorbell had been ringing for several minutes before it ______.
A answered       B had answered          C was answering       D was answered
答案
D
解析
这里动词answer是及物动词,所以要用被动语态。
核心考点
试题【The doorbell had been ringing for several minutes before it ______. A answered  】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
The notice ______ “No smoking”.  A is told     B reads          C tells      D is read
题型:不详难度:| 查看答案
-- Look! Everything here is under construction.
--- What’s the pretty small house that ______ for?
A.is being builtB.has been built
C.is builtD.is building

题型:不详难度:| 查看答案
I first met Mr. Smith in America. He ______ at Stanford University then.
A.studiedB.has studied
C.is studyingD.was studying

题型:不详难度:| 查看答案
It’s been over a year since I ______ back from the countryside.
A.come B.cameC.will comeD.had come

题型:不详难度:| 查看答案
--- What ______ when I phoned you?
--- I ______ my work, and I wanted to go out.
A.have you done; finished
B.were you doing; have finished
C.did you do; had just finished
D.were you doing; had just finished

题型:不详难度:| 查看答案
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