单项选择题

He felt helpless in a situation ______ he could not move himself.

A．where
B．which
C．that
D．while
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单项选择题
In me he found an ______ listener, who, by virtue of book reading, knew much about the sea-life he had lived.
A．appreciative
B．appreciate
C．appreciated
D．appreciating
单项选择题
When spring comes, the trees are ______.
A．in a flower
B．in flowers
C．in the flower
D．in flower
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