Modal in school an proffesional context

1.   I (a)   (can / could) go alone to the school when I was 10.

2. 2. Where is Kevin? He (a)   (should / shouldn’t) attend to the teacher meeting.

3.   We are in the music class. You (a)   (mustn’t / cannot) play the dumps because Mr. Robin in explaining.

4.   In my opinion, they (a)   (ought to / may) join to the english club.

5.   Principals tell us, everyone (a)   (must / mustn’t) wear uniform formally.

6.   (a)   (can / could) I speak to Miss. Perry, please?

7.   You (a)   (mustn't/could/should/has to) listen to your teachers. They want the best for you.

8.   Sarah (a)   (has to/should/can/could) play the saxophone better three years ago.

9.   It is danger! You (a)   (mustn't/may/can/has to) touch anything in the lab room.

10. 10. In the break, Susan (a)   (can/may/could/has to) play chess really well.