九年级英语改写句子,有例句
例：You mustn't take photographs.No photographs/Don't take photographs.You should return the library books on time~Return the library books on time.
1.You should be quiet in the reading room.
2.You shouldn't drop litter.
3.You should never swim here.
4.You mustn't smoke in the hospital.
5.You mustn't park your cars here.
6.You should be careful when you cross the road.