单项选择题

Last Thursday Professor Wang had his () birthday.

A．ninety
B．ninetieth's
C．ninties
D．ninetieth

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单项选择题

I can think of many cases()students obviously knew a lot of English words and expressions but couldn't write a good composition.

A．why
B．which
C．as
D．where

单项选择题

According to the art dealer, the painting()to go for at least a million dollars.

A．is expected
B．expects
C．expected
D．is expecting

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