阅读以下对话，选出所给问题的正确答案。

Wu Yifan: Excuse me, how can I get to the zoo?

Policeman: Are you going on foot?

Wu Yifan: Yes.

Policeman: Turn left at the library. Then go straight to the traffic lights. Turn left at the school. That's Shengli

                 Street.

Wu Yifan: OK. Then what?

Policeman: Walk straight for three minutes. The zoo is on the right. You can see it.

Wu Yifan: Thank you very much.

Policeman: You are welcome.

1. — How does Wu Yifan go to the zoo?  — He goes to the zoo ____________.

A. on foot

B. by bike

C. by bus

2. When (当……的时候) he gets to the library, he should ____________ the traffic light.

A. turn left at

B. go straight to

C. turn right at

3. The zoo is ____________ of Shengli Street.

A. on the left

B. in the middle

C. on the right