Over the past decades, sea ice _______ in the Arctic as a result of global warmi

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Over the past decades, sea ice _______ in the Arctic as a result of global warmi

题型：不详难度：来源：
Over the past decades, sea ice _______ in the Arctic as a result of global warming.
A．had decreasedB．decreased C．has been decreasing D．is decreasing

答案
C
解析
考查时态。句中有Over the past decades谓语动词用现在完成时或现在完成进行时。
举一反三
—What do you think of the movie?
—It’s fantastic. The only pity is that I ______ the beginning of it.
A．missedB．had missedC．missD．would miss

题型：不详难度：| 查看答案
.—I’ve got to go now.
—Must you ?I ______you could stay for dinner with us.
A．thinkB．thought
C．have thoughtD．am thinking

题型：不详难度：| 查看答案
Mary went to the box office at lunch time, but all the tickets ____out.
A．would sellB．had soldC．have soldD．was selling

题型：不详难度：| 查看答案
----Could you lend me that book you ____ me about when I telephoned you?
-----No,I am sorry, I can’t. I gave it to a friend.
A．were tellingB．would tellC．had toldD．had been telling

题型：不详难度：| 查看答案
----I’m sorry, but there is no smoking on this flight.
----Oh, I _____ that. Sorry, I won’t again.
A．don’t knowB．didn’t knowC．won’t knowD．haven’t known

题型：不详难度：| 查看答案
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