单项选择题

（）, such problems concerning environment protection are not as easy to solve as they look.

A. Speak generally
B. To speak generally
C. Generally speaking
D. General speaking

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I could not persuade him to accept it,（）make him see the importance of it.

A. nor more than I could
B. nor could I
C. or I could not
D. if only I could not
单项选择题
Not only I but alsoDavid and.Henry（）fond of playing basketball in the spare time.

A. am
B. is
C. are
D. was
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