单项选择题

He ______ to your home, for he doesn't know your address.

A．can't have been
B．mustn't have been
C．shouldn't have been
D．needn't have been
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单项选择题
Before taking such a test, one had better ______ his or her vocabulary.
A．outline
B．translate
C．revise
D．brush up
单项选择题
Your offer is very attractive but I need to ______ before I let you know my decision.
A．think better of it
B．think it over
C．make up my mind
D．come out
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