单项选择题

We tried to settle the problem with them as soon as possible, but they seemed to ______ sincerity.

A．lack of
B．be lack of
C．lack in
D．be lacking in
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单项选择题
By the time you receive this letter, I ______ for America.
A．will leave
B．have left
C．would have left
D．will have left
单项选择题
Being somewhat short-sighted, she had the habit of ______ at people.
A．glancing
B．peering
C．gazing
D．scanning
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