问题

Which of the following usually causes

Which of the following usually causes a tree to grow unhealthy?

A Giving a tree a special shape and a definite height.
B Removing small side branches and making a tree look less thick.
C Allowing too many branches to grow in the middle.
D Having a tree surrounded by many other trees.

参考答案

参考解析：

42．答案为C 根据第二段A tree may grow healthier by removing the branches that are locking up the centre可知树中间的枝杈不利于树木生长，C与文章内容相反，因此错误。

分类：其他

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