单项选择题

I don't doubt () he'll come.

A. that
B. if
C. what
D. whether

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单项选择题

When they had finished playing, the children were made to () all the toys they had taken out.

A. put out
B. put off
C. put up
D. put away

单项选择题

We met the old man () times on the way home.

A. dozen of
B. dozen
C. dozens
D. dozens of

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