Complete the following sentences, using "can/ can't/ must/ mustn't"

Complete the following sentences, using "can/ can't/ must/ mustn't":
1. The studens.............. do their homework at home.
2. The "No smoking" sign says you...........smoke
3. Children............ play soccer in the classroom
4. The traffic lights are changing red. We.............go.
5. The "Parking" sign says you.........park you car here.
giải thik hộ em vs ạ. em cảm ơn mọi người đã giúp em