单项选择题

The only thing that really matters to the children is how soon they ()return to their school.

A. can
B. must
C. have to
D. ought to

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单项选择题
When I handed the report to John, he said that George was the person ()

A. to send
B. for sending it
C. to send it to
D. for sending it to
单项选择题
Little Franz thought of nothing but () football.

A. play
B. to play
C. played
D. playing
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