Trees are useful to people. They provide them

wood, give them shade, and help to prevent                   1.——

drought and floods. Unfortunately,

people have not realized the importance of trees.             2.——

They cut it down in large numbers.                   3.——

Some need them cook their meals,                   4.——

the others earn money by selling them. This doesn't             5.——

only mean our children and grandchildren have                6.——

fewer trees. The results are even serious.                7.——

Where there are no trees, rain can cause floods.

Rain will carry away the rich top-soil very easy.              8.——

When all top-soil is gone, nothing remains

besides worthless desert. The forest will                9.——

be disappear slowly unless something is done.                10.——

 

答案:
解析:

1wood—with woodprovide sbwith sth.此處的with不可省略。

2

3it→them。此處指代的是trees,是復(fù)數(shù),故用them。

4cook→to cook。to cook表示的是need them的目的,故用動(dòng)詞不定式。

5the others→others。此處用others泛指其他人。

6have→will have。此處時(shí)態(tài)應(yīng)用將來(lái)時(shí)。

7even→even moreeven后應(yīng)用比較級(jí),故要加上more。

 8easy→easily。easily作為副詞修飾的是動(dòng)詞詞組carry away

9besides→but。nothing...but表示除了……什么都不……”的意思。

10.去掉be。disappear是不及物動(dòng)詞,前面不需be

 


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