单项选择题

According to the author, a born naturalist should first of all be （）

A．full of ambition
B．knowledge
C．full of enthusiasm
D．self-disciplined

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单项选择题

The word operation (Line 3, ParA．4) refers to （）

A. sports activities
B. hunting
C. prey killing
D. domesticating animals

填空题

65（）

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