口语交际（共5分，每小题1分）
在下面对话的空白处填入适当的话语（话语可以是句子、短语或词），使对话完整，并将答案写在答题卡的相应位置。
(It’s time for break. Two students are in the classroom.)
A: Hi, what are you thinking about?
B: I’m thinking about some ways we can do to protect the environment.____?
A: I come to school in my father’s car every day.
B: Oh, _____?
A: Good idea. It costs nothing.____, too. It’s a good time to take exercise. But our house is too far. It takes me much time to walk here. Haha, I’ll be often late.
B: You had better ride a bike to school.
A: OK. I’ll buy a bike. We can ride bikes together after school.
B:____. Let’s write all the ways down to hand them out to make more people know them.
A: It’s really nice of you to do that.
B: ___. Protecting the environment is everyone’s duty.
A: Then let’s do it together now.
B: All right.