单项选择题
He ought to have handed in the paper yesterday. That's what he ______ .
A.should do
B.should
C.should be doing
D.should have done
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校长办公室 通 知 据校长办公室通知,由校长主持的关于去年的工作报告会议将定于5月20日星期四下千两点半在教学楼603室召开。全体老师准时参加。 2005年5月18日
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单项选择题
All the class burst ______ laughter when they saw the funny picture.
A.in
B.at
C.on
D.into
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