Storytime 剧情填空挑战

1. A: What does that sign mean?
B: It means you ______ eat here. (can / can’t / must)

2. A: Look at the sign! It says "No littering".
B: Oh, right! It means we ______ throw rubbish on the floor. (can / can’t / must)

3. A: Why can’t we talk loudly here?
B: Because there’s a "Keep quiet" sign. It means we ______ be quiet. (can / can’t / must)

4. A: Is there a "No smoking" sign in the library?
B: Yes. It means people ______ smoke there. (can / can’t / must)