1 Look at the signs. Match them with proper places and use must or mustn't to complete the sentences. 看标识,将其与合适的地点配对,并用must或mustn't完成句子。

In the park:
(1) Sign A means we mustn't pick flowers in the park.
(2) Sign B means
(3) Sign C means
(4) Sign D means
In the park:
Sign A, Sign B
In the library: Sign D
In the lab: Sign C, Sign D
(1) Sign A means we mustn't pick flowers in the park.
(2) Sign B means
we mustn't fish/go fishing
in the park
.(3) Sign C means
we must wear safety gloves
in the lab
.(4) Sign D means
we mustn't eat or drink
in the lab/library
.答案
1. (1)park; mustn't pick flowers; (2)park; mustn't fish/go fishing; (3)lab; must wear safety gloves;
(4)lab/library; mustn't eat or drink
(4)lab/library; mustn't eat or drink
2 Complete the conversation with sentences A to F in the box. 从方框中选择合适的句子补全对话,填写序号(A-F)。

Emily: Peter! Do you know the rules of our school swimming team?
Peter: Of course! (1)
Emily: Yes. It's important to start training on time. (2)
Peter: We must do warm-up exercises before swimming. It can keep us from getting hurt.
Emily: Okay, I see.
Peter: (3)
Emily: I agree with you. They help us improve our swimming skills.
Peter: (4)
Emily: Exactly, it's very dangerous. (5)
Peter: Yes. (6)
Emily: That means we should put our things in the right place and we mustn't leave any rubbish.
Peter: That's right. If everyone follows the rules, we'll all have a great time on the swimming team!
Emily: Peter! Do you know the rules of our school swimming team?
Peter: Of course! (1)
D
And we must bring our swimwear.Emily: Yes. It's important to start training on time. (2)
F
Peter: We must do warm-up exercises before swimming. It can keep us from getting hurt.
Emily: Okay, I see.
Peter: (3)
A
They guide us to be better swimmers.Emily: I agree with you. They help us improve our swimming skills.
Peter: (4)
C
Emily: Exactly, it's very dangerous. (5)
E
Peter: Yes. (6)
B
Emily: That means we should put our things in the right place and we mustn't leave any rubbish.
Peter: That's right. If everyone follows the rules, we'll all have a great time on the swimming team!
答案
2. 依次填: D、F、A、C、E、B
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