单项选择题

As a biologist and ecologist, he is () all forms of hunting.

A. against
B. down
C. back
D. off

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单项选择题
He can speak French, German and Russian, () English.

A. don't mention
B. no mention
C. not mentioning
D. not to mention
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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