单项选择题

It is vital that food and shelter are made ______ for people in the flood-stricken are

A． freeB. usefulC. availableD. usable
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单项选择题
Earthworms occur ______adequate moisture and food and the necessary soil conditions are found.
A．and
B．whenever
C．however
D．wherever
单项选择题
He is an artist in ______ but not in reality.
A．surface
B．title
C．rank
D．name
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