Question

请大家帮我回答一下几个英语句子，谢谢~

1.A big fire ____ down the house yesterday.
2.Tree can fight air _____. They are natural air conditioners.
3.People cut down and ______ large amounts of forests every year.
4.Trees can ______ their neighbours about ______ attacks.
5.We don't know how trees _____ with one another.
6.In summer, trees can _____ us from the hot sun.

Answer 1

1. burned
2. pollutions
3. use
4. informs; malicious
5. communicates
6. protect