单项选择题

If you ______ change your mind, please let us know.

A．should
B．shall
C．will
D．would
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单项选择题
To understand the situation completely requires more thought than ______ thus far.
A．be given
B．is given
C．has been given
D．has given
单项选择题
He claimed to be a scholar but was not ______.
A．this
B．so
C．such
D．that
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