S:   But do you know 73.                     after using them?

E:    Yes. Some people often throw them away carelessly.

S:   They don’t realize they have made the environment polluted.

72.                   ？

E:   Yes. It’s really convenient (方便的) to use them.

S:   Plastic (塑料的) bags thinner than 0.025 mm will not be allowed to use in the supermarket.

E:   Really? Glad to hear that.

S:   Me too. But I think they are really useful in our daily lives.

E:   71.                    ？

N:   70.                   

M: Er, many, such as popular fairy tales, science stories and so on.

N:   What a good job you have done! I hope they will rebuild their homes and go back to school soon.

B) 根据情景，把下列对话内容补充完整，使其意思连贯。

(S = Shirley; E = Eric)

S:   Hi, Eric! Great news!

N:   68.                   Our school has done something to help them. I have donated 200 yuan to them.  69.                  

M: Our school has organized a charity show to raise money for the children there. Many students have donated books as well.

67.                  

M: Maybe. They’ve suffered a lot. Many of them have become homeless. Some even have lost their lives.

N:   It’s June 1. It’s Children’s Day. It’s about 20 days since the earthquake hit Wenchuan.

M: 66.