单项选择题

______to be a bad flood that year.

A．There was
B．There happened
C．There were
D．There happens
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单项选择题
It is essential that all these figures______twice.
A．being checked
B．are checked
C．checked
D．be checked
单项选择题
He didn’t come to the party last night. He ______to see us.
A．might not have wanted
B．could not have wanted
C．should not have wanted
D．ought not to have wanted
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