单项选择题

He will never seem to be successful, ______ hard he tries because no one is supporting him.

A．however
B．whenever
C．wherever
D．whatever
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单项选择题
Only when he works harder ______ the exam.
A．Tom can pass
B．Tom will pass
C．can Tom pass
D．was Tom to pass
单项选择题
It wasn't such a good book ______ he had described.
A．as
B．that
C．which
D．what
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