阅读下面短文，选择正确答案。

      Zhang Peng has a pen pal. His name is John. John goes to school on foot, and John's mother is a doctor.

John's father is a teacher. They live next to a hospital. John's favourite food is noodles, and his favourite colour

is red. Zhang Peng knows a lot about his pen friend.

1. How does John go to school?  He goes to school ____________.

A. on foot

B. by bike

C. by subway

2. What does John's father do?  He is a ____________.

A. teacher

B. doctor

C. policeman

3. Where do they live?  They live next to a ____________.

A. cinema

B. hospital

C. library

4. John's favourite food is ____________.

A. rice

B. dumplings

C. noodles

5. John's favourite colour is ____________.

A. red

B. blue

C. white

6. Does Zhang Peng know a lot about John's pen friend? 

A. Yes, he does.

B. No, he doesn't.

C. I don't know.

慢性经口毒性试验染毒途径常采用

A．喂饲
B．灌胃
C．肌内注射
D．腹腔注射
E．静脉注射