问题

The teacher asked Ben ____________ a difficult question in class.
A:answer
B:answering
C:to answer
D:answered
B:answering
C:to answer
D:answered
正确答案是:
同类题型
We haven’t got enough books for everyone to have one: some of you will have to ______.
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Miss Lin is handing out the exam papers. Let’s go and help_____.
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