四、IV. Read and choose.（其他班的同学也正在制定班规。根据下列场景，选择合适的选项补全对话。）
What are you doing?
: 1. ___
: Wow, cool! 2. ___
: We have 5 rules. What about your class?
: 3. ___ Can you take toys to school?
: 4. ___ It's one of our class rules.
: That's a good rule.
：5. ___

Ⅳ. 1. B 2. C 3. D 4. E 5. A