单项选择题

He is too young ______ the old society.

A．to see
B．to have Seen
C．to seeing
D．to having seen
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单项选择题
I'm at my wits' end. Tell me to do.
A．how
B．what
C．when
D．why
单项选择题
______ has recently been done to provide more flats for the people, the housing problem in this city is still very serious.
A．What
B．That
C．As a matter of fact
D．In spite of what
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