单项选择题

A．Mr. Smith has signed the contract.
B．Mr. Smith is unavailable till Thursday.
C．The man should have called before the visit.
D．She is not sure when Mr. Smith will be back.
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单项选择题
A．A stranger. B．A murder. C．A robbery. D．A burglary.
A．A stranger.
B．A murder.
C．A robbery.
D．A burglary.
单项选择题
A．They may meet tomorrow afternoon. B．They had better do the experiment first. C．There is no need to discuss the program. D．They should start the program as soon as possible.
A．They may meet tomorrow afternoon.
B．They had better do the experiment first.
C．There is no need to discuss the program.
D．They should start the program as soon as possible.
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