单项选择题

A．constitutes
B．constitute
C．comprises
D．comprise
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单项选择题
A．has becomeB．have becomeC．becomeD．became
A．has become
B．have become
C．become
D．became
单项选择题
A．someB．anyC．aboveD．or so
A．some
B．any
C．above
D．or so
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