--Has Billy finished his homework today?--I have no idea．He it this morning．( )A．would doB．was doingC．has doneD．had done 题目和参考答案——青夏教育精英家教网—

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18．--Has Billy finished his homework today？
--I have no idea．He ______ it this morning．（　　）

A．

would do

B．

was doing

C．

has done

D．

had done

分析 ---Billy已经做完今天的作业了吗？
---我不知到．他今天上午一直在写．

解答答案：B．根据I have no idea可知我不知到Billy是否已经做完今天的作业了，所以后句表示他今天上午一直在写，所以答案是B表示过去一段时间一直做的事．

点评考查过去进行时．过去进行时（Past continuous tense或Past Progressive tense）表示在过去某一时刻，也可以表示某一段时间内发生或进行的动作或状态．

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