情景交际。从方框中选出适当的句子补全对话,其中有两项是多余的。 | |
A: Lucy, why are you going out 1. ? B: That's the sound of a truck collecting rubbish. A: Do you mean you have to take the rubbish to the truck? B: Yes. You know 2. is our duty. We should help protect the environment. A: I agree. 3. , we must do something around the neighbourhood. B: Sure. It is our duty to keep the environment clean and tidy. If we make a contribution to protecting the environment, 4. A: That's right. We mush try our best to make our country more beautiful. So we should 5. to improve the environment.
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