单项选择题

There is no doubt（）Herbert is the most industrious student in our class.

A、 whether
B 、what
C、 that
D、 if

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单项选择题
The doctor insisted that Paul' s mother（）examined thoroughly.

A、 would be
B 、must be
C、 be
D、 should have been
单项选择题
Kevin is the only student in the class（）failed in the exam.

A、who
B、that
C、which
D、whom
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