大学英语四级阅读理解试题及答案(四)

大学英语四级阅读理解试

题及答案（四） 十六

Trees only be when there is a good and clear for doing so and , ,the of such is small. the away of and , and the can be by the that more from doing it than from the tree to grow in its own way.

First,may be done to make sure that trees have a shape or size。 The may be to get a tree of the right英语四级阅读理解,and at the same time to help the of small side which will its or give it a shape。英语四级阅读理解, may be done to make the tree 。 You may cut or dead wood, or that are each other and thus cause 。 The of a tree may be by that are up the and so the free of air。

One of is that an open wound is left on the tree and this an easy entry for , but itis a wound that will heal。 Often there is a race the and the as to the tree will live or die, so that there is a when the tree is at risk。 It be the aim of every to which has been and clean, for will be down by 。 You allow the cut to dry for a few hurs and then paint it with one of the from shops for this 。

is from the and also it is very that the cuts yu make will bleed。 If this does ,it is, of , to paint them 。

1. be done to .

a.make the tree grow

b. the shape of the tree

c.get rid of the small