听问题，选择正确的答语。
（1）A.I’m reading a book.
B.They’re listening to music.
（2）A.It’s up the hill.
B.No, it isn’t.
（3）A.Yes, I have.
B.No, I don’t.
（4）A.Yes, we have.
B.No, thank you.
（5）A.He’s writing a letter.
B.She’s playing with a toy.
I can go at a________light.
A. redB. yellowC.green
If you go on the road,you must know the________.
A.traffic rulesB. traffic C.lights
In U.S. you must wear a________when you ride a bike.
A.helmetB.hatC.scarf
—Let’s go to Children’s Center!
—______________________
A.That’s all right. B.Thank you. C.Hooray!
—Excuse me. Can you help me?
—_______________________
A.By bus.B.Good. C.Yes.