单项选择题

Earthworms occur______adequate moisture and food and the necessary soil conditions are found.

A．but
B．where
C．however
D．and
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单项选择题
Never before that night______the extent of my own power.
A．did I feel
B．had I felt
C．I had felt
D．I did felt
单项选择题
Those gifts of rare books that were given to us were deeply______.
A．appreciated
B．approved
C．appealed
D．applied
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