单项选择题

Tom isn't here. He () for almost an hour.

A．has gone
B．has been away
C．has left
D．has set off

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单项选择题
You()be tired, for you've only been working for an hour.

A．must not
B．won't
C．can't
D．may not
单项选择题
We haven't enough books for (); some of you will have to share.

A．somebody
B．anybody
C．everybody
D．nobody
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