单项选择题

None of the servants were ______ when Mr. Smith wanted to send a message.

A．available
B．attainable
C．approachable
D．applicable

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单项选择题

A．concern
B．concerning
C．concerned
D．to concern

单项选择题

The large passenger jets have made the traffic problems at airports ______.

A．the worse than before
B．worse than ever before
C．more bad as before
D．more bad than it was

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