一When did you learn the news that Obama made a trip to Canada as President?一 ___

一When did you learn the news that Obama made a trip to Canada as President?一 ___

题型:不详难度:来源:
一When did you learn the news that Obama made a trip to Canada as President?
一 ____ was on my return.
A.ThatB.ItC.ThereD.This

答案
B
解析
B根据句意可以得知,问的是时间,it可以指代时间,属于it的实指用法。
举一反三
He didn’t make ______ clear when and where the meeting would be held.
A.thisB.that C.itD.these

题型:不详难度:| 查看答案
—Does _____please you to give gifts to others?
—Sure.
A.itB.thatC.oneD.he

题型:不详难度:| 查看答案
Though we found _____difficult to avoid economic and financial crisis, we must take measures to reduce its negative impact.
A.itB.oneC.thatD.how

题型:不详难度:| 查看答案
—Do you think_____ worthwhile to go all the way to Los Angles to buy that computer?
—Well ,I’m going to visit some relatives, too.
A.itB./C.thisD.that

题型:不详难度:| 查看答案
No one knows exactly when our ancestors started talking,but new evidence suggests  _______might have happened a long time ago.
A.whichB.whatC.itD.they

题型:不详难度:| 查看答案
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