单项选择题

All _________to Hong Kong were delayed because of bad weather.

A．fly
B．flights
C．flyings
D．flies
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单项选择题
We were talking about the American tourist _________we met during our trip to the Great Wall.
A．what
B．which
C．whose
D．whom
单项选择题
The _______the proposal is considered, the worse it appears.
A．carefully
B．much carefully
C．more carefully
D．most carefully
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