题目
把以下句子变为一般疑问句和反问句：Trees help us in many ways.Trees keep the air cool and clean.
They take in harmful gasses from they air.
They are major fighters against air pollution.
I know trees make our lives more convenient.
Many of the things in our daily lives come from trees.
Tea comes from the leaves of trees.
A lot of furniture is made of wood.
I can imagine a world without trees.
We should stop doing this.
They take in harmful gasses from they air.
They are major fighters against air pollution.
I know trees make our lives more convenient.
Many of the things in our daily lives come from trees.
Tea comes from the leaves of trees.
A lot of furniture is made of wood.
I can imagine a world without trees.
We should stop doing this.
提问时间：2020-10-05
答案
Do trees help us in many ways?Do trees keep the air cool and clean?
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