F Read and choose（读对话，选出正确答案）选做题
Tom and his mum are tidying their home.
Tom: We don’t need these things. Can we throw them away, Mum?
Mum: Wait a minute. Look at the paper. We can write or draw on the other side.
Tom: But why? Paper is cheap.
Mum: Because paper comes from trees. Trees can keep the air clean. Saving paper is saving trees.
Tom: So it helps take care of the Earth.
Mum: That’s right. When we use old things again, we make less (更少) rubbish. It’s one way of going green.
Tom: It’s not difficult. Everyone can do it.
Mum: Yes. And it can help the Earth a lot.
(
B
) 1. Where are Tom and his mum?
A. In the library. B. At home. C. In the park.
(
C
) 2. What should Tom do with the paper?
A. Throw it away. B. Sell it. C. Use both sides of it.
(
A
) 3. What can trees do for the Earth?
A. They can keep the air clean.
B. They can make paper cheap.
C. They can make less rubbish.
(
B
) 4. What does Tom think of going green?
A. Hard. B. Easy. C. Cheap.
