根据对话打“√”或“×”判断对错。
Liu Yun is asking to a policeman.
Liu: Excuse me. Where is the ZhongBai Supermarket, please?
Policeman: It's west of the hospital.
Liu: Is it far from here?
Policeman: Yes.
Liu: How can I get there?
Policeman: First, turn left and take the No. 16 bus at the bus stop. Next, get off at the hospital.
Then, cross (穿过) the street. You'll be in front of the post office.
Liu: Thank you.
Policeman: You're welcome.
( ) 1. The post office is next to the supermarket.
( ) 2. The supermarket is west of the hospital.
( ) 3. Liu Yun goes to the supermarket on foot.
( ) 4. Liu Yun asks a policeman for help.