单项选择题

He________ that the police would never allow this sort of thing.

A．should have known
B．would have known
C．could have known
D．might have known
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单项选择题
Some teachers believe that students who score high in________ needs tend to make higher grades in college than those who score low.
A．acknowledgement
B．achievement
C．advertisement
D．announcement
单项选择题
The dean of our department won't ________a lesson tomorrow morning, because he has asked for a sick leave.
A．be given
B．be giving
C．have given
D．have been giving
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