单项选择题

A．used by
B．available for
C．available to
D．ready for
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单项选择题
A．becauseB．andC．withD．provided
A．because
B．and
C．with
D．provided
单项选择题
A．be taking placeB．take placeC．be taken placeD．have taken place
A．be taking place
B．take place
C．be taken place
D．have taken place
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