2014年6月份的已经落下帷幕,等在我们眼前的是12月份的四六级考试。考完试的同学不要忘记继续关注四六级频道,我们会在第一时间发布考试成绩查询信息。英语四级仔细阅读篇幅较短、题型相对容易,考生容易拿分,所以对这一部分的复习一定不能松懈,尽管距离考试还有几个月的时间,但是备考是一个漫长的过程,一定不要心存幻想,等着时间不够了再来着手复习,要有未雨绸缪的思想来面对四六级考试,所以从现在起考生就要坚持练习,下面是一篇四级阅读练习,快来练练吧。
Trees should only be pruned when there is a good and clear reason for doing so and , fortunately,the number of such reasons is small. Pruning involves the cutting away of obergrown and unwanted branches, and the inexperienced gardener can be encouraged by the thought that more damage results from doing it unnecessarily than from leaving the tree to grow in its own way.
First, pruning may be done to make sure that trees have a desired shape or size. The object may be to get a tree of the right height, and at the same time to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut diseaed or dead wood, or branches that are rubbing against each other and thus cause wounds. The health of a tree may be encouraged by removing branches that are blocking up the centre and so preventing the free movement of air.
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