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.
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试题解析
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。