单项选择题

He found it increasingly difficult to read, ______ his eyesight was beginning to fail.

A．and
B．for
C．but
D．or
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单项选择题
Nine out of ten women ______ about the product said they liked it.
A．to interview
B．to be interviewed
C．interviewed
D．having interviewed
单项选择题
I always keep fruit in the fridge ______ insects off it.
A．so as to keeping
B．so as keep
C．so as to be kept
D．so as to keep
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