单项选择题

--I saw Anna in the library yesterday.
--You __________ her; she is still abroad.

A．must not see
B．can't have seen
C．mustn't have seen
D．couldn't see
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单项选择题
A．Someone is already using the phone.B．Is the call definitely a local oneC．Isn’t the phone working nowD．It’s OK to use the phone.
A．Someone is already using the phone.
B．Is the call definitely a local one
C．Isn’t the phone working now
D．It’s OK to use the phone.
单项选择题
If you had done as I told you, you __________.
A．will succeed
B．would succeed
C．would have succeeded
D．should succeed
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