C. Read and number. 读一读,给图片排序。
The lunch bell rings (打铃)! I want to run to the canteen, but Li Ming stops me. "Slow down, Danny! Let's walk there." Now I know more school rules.

a. Walk on the right.
b. Wait in line to get food.
c. Eat up food.
d. Keep the canteen clean.

6,4,1,5,2,3

D. Think and write. 想一想,写一写。

wait in line walk on the right eat in the library write in library books run in the classroom keep the gym clean
We should:
1.
2.
3.
We shouldn't:
1.
2.
3.

We should: 1. wait in line 2. walk on the right 3. keep the gym clean
We shouldn't: 1. eat in the library 2. write in library books 3. run in the classroom

题目要求从所给短语中分别选出应该做和不应该做的行为。
所给短语“wait in line（排队等候）”“walk on the right（靠右走）”“keep the gym clean（保持体育馆清洁）”属于应该做的行为；“eat in the library（在图书馆吃东西）”“write in library books（在图书馆的书上写字）”“run in the classroom（在教室里跑）”属于不应该做的行为。
按照题目序号顺序，从中各选三条合理内容填入即可。