单项选择题

The factory produces half a million pairs of shoes every year, 80% ______ are sold abroad.

A．of which
B．which of
C．of them
D．of that
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单项选择题
We have been to the theatre for too many times! Not once since we arrived here ______ to the movies!
A．we have gone
B．we have been
C．had we gone
D．have we been
单项选择题
It is ______ he often breaks the school rules ______ makes his headteacher unsatisfied with him.
A．what; that
B．that; what
C．that; that
D．which; that
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