They studied what ______ since 2007 and found Australian electricity prices were
题型:不详难度:来源:
They studied what ______ since 2007 and found Australian electricity prices were among the highest in the developed world.A.has happened | B.happened | C.had happened | D.has been happening |
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答案
C |
解析
考查时态。根据studied知道句子本身是过去时,2007年发生的事情正是研究的对象,说明他们是在研究之前发生的,所以应该使用过去完成时。 |
举一反三
Toni Morrison, Nobel Prize-winning American writer, says if there’s a book you really want to read, but it ______ yet, then you must write it.A.hasn’t been written | B.hasn’t written | C.doesn’t write | D.isn’t written |
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—No one answered when I phoned this morning. Where were you? —I for teeth in the dental clinic.A.was being treated | B.have been treated | C.was treated | D.Treated |
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—How long have you retired, Grandpa? —Well, four years, But you know, I for Courtaulds for over forty years.A.have worked | B.worked | C.had worked | D.Work |
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--- Julia hurt her back when she fell, and she is now in hospital. --- Oh, really? I _____ know. I _____ go and visit her.A.don’t; would | B.didn’t; will | C.don’t; will | D.didn’t; am going to |
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