五、阅读对话，完成任务。
Tom: This book is fun.
Bob: Don't talk. 1.
Tom: I'm sorry.
Bob: That's OK. Let's follow the rules.

Bob: Good morning, Tom. Let's go to the library.
Tom: Great! But how?
Bob: 2.
Tom: Great idea! I have a new bike.
Bob: Please take your helmet (头盔).
Tom: Sure.

Bob: Stop, Tom! The traffic light is red.
Tom: I'm sorry. Let's wait for the green traffic light.
Bob: We can go now. 3.
Tom: Wait. Look left and right first.
Bob: That's right.

a. 选择合适的句子补全对话，将序号填写在横线上。(其中有一个多余选项)
A. Let's ride bikes (骑自行车).
B. Keep quiet, please.
C. The traffic light is green.
D. Let's take a bus.
b. 根据时间顺序给对话排序，把序号填在方框里。
c. 根据对话内容，选择正确的答案。
() 1. How do Bob and Tom go to the library?
A. Take a bus.
B. Ride bikes.
C. Take a car.
() 2. What should they do in the library?
A. Keep quiet.
B. Eat food.
C. Run fast.