单项选择题

______ what you intended, I should not have wasted my time trying to explain matters to you.

A．If I realized
B．Did I realized
C．Were I realized
D．Had I realized
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单项选择题
Optometristis (验光师) will happily testify that the only significance of thick, hornrimmed glasses is that they distinguish persons with bad eyes ______ intellectual or illiterate.
A．they are
B．are they
C．be they
D．they be
单项选择题
If you don't put the cheese. in the refrigerator, it may ______.
A．go at
B．go off
C．go on
D．go back
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