【单选题】 People who love trees may ______.
A.never cause trees injury
B.damage trees on purple
C.do some harm to trees without knowing it
D.not be aware of which trees are healthy
网考网参考答案:C
网考网解析:
细节题。通过文章的第二段可知喜欢树木的人很可能会不经意间伤害了它们。
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