(用所给词的正确形式填空) Thousands of trees __________ (plant) in spring every year．

Forests help to keep water from running away，so drought（干旱）doesn’t often happen．Chinese people have built a“Great Wall”of trees，millions of trees across the northern part of the country．

    The Great Green Wall 1 ________ （be）7,000 kilometres long，and it will stop the wind from 2 ________（blow）the earth away．It 3 ________already ________（save）a lot of land．

    Wang Feng is a worker at Yulin in Shanxi Province．He 4 ________ （work）on the Great Green Wall with many other people．We 5 ________ （visit）him at his workplace and when we saw him he 6 ________ （work）among the trees．He told us something about his work“We must 7 ________ （plant）many thousands of trees every year，”he said“You see all those small trees over there on that hill? That was sand five years ago．Now it's a young forest! In a few years’ time，we 8 ________（cover）those mountains with trees，too!”He pointed to the high mountains far away．

    Was it difficult 9 ________ （work）on the Great Green Wall?

    Yes，It’s hard work．but it's very important．The only problem is we have to 10 ________（grow）our own food．But thanks to the Great Green Wall，the land produces more crops．So the more trees there are，the better harvest we have．”

阅读下面题目，判断正误， 请在不改变句子意思的前提下， 改正其中的错误部分。

(1) Zhou Gang is a worker at Yulin in Shanxi. He

(2) works on the Great Green wall with many other peoples.

(3) We visited him at his workplace between the young trees

(4) and told him about his work. "Many thousands of trees

(5) must be plant every year," he said. "The more, the better.

(6) This year alone, we've already planted ten thousand of trees.

(7) You see all that small trees over there on the hills

(8) That was sand five years later. Now it's a young forest! In a few

(9) years' time, those mountains will be covered with trees,

(10) too!" He pointed the high mountains away.