The train _________ at 7∶00, but we have been waiting for as long as two hours．
A.musthavearrivedB.mighthavearrivedC.wassupposedtoarriveD.arrived...
A. must have arrived B. might have arrived C. was supposed to arrive D. arrived
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答案C 此题用C项表示“应该”。 查看原帖>>
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