1.Trees can cool the air.
2.Trees clean the air.
3.We make the food cool.
4.Trees give out oxygen.
5.France is famous for its food.
6.She is in danger.
7.I bought her a pen.
8.We can’t live without water.
9.She made me eat meat.
10.I made the hot water cool.
11.They are fighters against pollution.
12.Don’t walk.I warn you?
13.Thanks a lot.
14.I bought a fish.It is alive.
15.He was thankful to me.
16.She made the water dirty.
17.Mom had me stand there.
18.We are against the plan.
19.They know a lot.
20.Jack is only 4 years old.
是用英语解释英语