单项选择题

The rest of his life is ______ to the cause of international exchange of visiting scholars.

A．added
B．put
C．saved
D．committed
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单项选择题
Bell won't drive us to the train station. He has ______ to take us all.
A．too small a car
B．a too small car
C．very small a car
D．such small a car
单项选择题
Dress warmly, ______ you'll catch cold.
A．on the contrary
B．or else
C．or rather
D．in no way
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