Circle the correct word. 1. you can't /must /mustn't get permission to invite friends in your room. 2. you can /must /can't sister on the grass! you will destroy the flowers. 3. i rent/rented /rents a flat yesterday. 4. how mush did/do/are you pay per month. 5. we go/are going/went out last night. 6. you can't /couldn't /don't have parties in your rooms! it's not allowed. 7. look! they are dancing/dance/danced.
2. can't (not sure, I think it should be mustn't, and perhaps you can't sister on the grass, you can only sit)
3. rented
4. do
5. went
6. can't
7. dancing
I don't guarantee on the perfection of the answers...