Reading 

A 1—8 cagbh fde 

B 1 A story about Yang Shanzhou and his great green forests. 

   2 A project named "Ant Forest" is under way via Alipay. True trees will be planted in desert if people plant virtue trees in Alipay account.

C1     3 1 4 5 2     

C2 1 Because Yang believed that by planting a forest, he could help improve the environment and the living conditions of local people.

      2 twenty-two years

      3 omitted （略）

D1 omitted

D2 1 planting trees can help purify air, reduce greenhouse effect and prevent some natural disasters. 

      2 Ant forest

Vocabulary and grammar

A 1—6 produce, take in, harmful, are made of, millions of, In fact

B 1—12 are doing , am reading , love, borrow, find, am reading, ask, don't understand, means, smell, don't think, am trying

Listening and speaking

    Omitted 略

More reading

A 1 A lot of rain and warm weather

    2 It can keep us awake when we feel tired

    3 About 4000 years ago

    4 They like drinking tea with mint and lots of sugar

    5 On a hot  Summer day

B 1—8 bcdac   bcc 

    植物生长在每个角落，大多数植物在春天和夏天生长最快，因为天气很暖和而且雨量充足。当秋天来临时，植物生长得慢了，在冬天来临之前一些植物甚至可能会死掉。秋天，树叶变黄并且掉落。没有了叶子，植物散发更少的水分。

    每种植物有它自己的生活环境，它们需要一定的温度，阳光，湿度。当环境遭到破坏，它们可能会死。如今，人类的行为引起大量的污染，这对植物的生长很有害。比如，温室效应和酸雨正在摧毁亚马逊森林。许多植物都死了，大量植物的灭绝告诉我们要对抗环境污染。

C1 1 clear the land, they plant new crops such as rice

      2 started many months ago, the land is very dry

      3 people'healthy

      4 tourists are coming here

      5 destroying the forests

C2 1 Because the farmers use fires to clear the land before they plant new crops such as rice and a drought started many months ago, So the land is very dry.

       People should build up the awareness of forests fire prevent and shouldn't light a fire in forests.

      2 There is no green and fresh air in our lives without the forests. 

Writing

A 1 Trees can be the fighters against pollution

      No, there aren't

      Yes, we should

    2 We can see some students on some empty land.

      They are digging holes in the ground to plant trees. 

    3 I hope other people can help plant trees and not cut down them, Because now the earth is in great danger due to(由于) environment pollution.

B Trees do a lot for people . They provide food and produce Oxygen. They are fighters against pollution. However, now there are not enough trees and the earth in great danger due to(由于) environment pollution. Thus(因此), we should make effort to plant more trees , I hope that people will not cut down trees and start to plant trees to protect our earth.（潜龙家教谭老师录入，请您先自己做，再核对答案，谢谢！）