学进去

Mr Zhang is a firefighter. He is visiting a school. The students are asking him some questions.
Wang Fei: How old were you when you became a firefighter?
Mr Zhang: I was 21 when I became a firefighter.
Tim: When do you usually work?
Mr Zhang: We usually work from 7 am to 7 pm or from 7 pm to 7 am.
Mary: What do you do when there are no fires?
Mr Zhang: We clean and fix (修理) our equipment (装备). We also train (训练) for about one hour each day.
Li Ming: When we call 119, do you answer the phone?
Mr Zhang: No! When you call 119, someone else answers the phone. They aren't firefighters. They tell us and we quickly get into the fire truck. We want to stop the fire when it's small.
Teacher: OK, students, let's thank Mr Zhang for coming today and for putting out fires. We should be careful and never start fires.
1．Mr Zhang works 14 hours a day. (        )
2．Firefighters want to stop a fire when it is small. (        )
3．Firefighters never clean and fix their equipment. (        )
4．Firefighters answer the phone when someone calls 119. (        )