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单项选择题

Mr. White has three children, all ______ have become professors.

A. of whom
B. of which
C. of them
D. of those
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单项选择题The argument went on for hours as neither side would ______.

A. give in
B. give on
C. give off
D. give away

单项选择题He changed his name, ______ that nobody would find out what he had done before.A. having thoughtB. to think C. thinks D. thinking