V. Complete the following sentences using the modal verbs should/ shouldn’t, can/could/couldn’t, may/might, must/mustn’t or ought to.
1. I …. start to run every day, to get fit.
2. It …. be very difficult at first.
3. Who …. knows, I even enjoy it!
4. You …. go to bed earlier. And you …. read so late.
5. Well, you …. do more exercise. And you …. eat later than 7pm.
6. And you certainly …. stay up watching late-night films.
7. You …. be …. stop telling me what to do all the time!
8. My little brother …. ride a bicycle, so he wants me to teach him.
9. My parents …. understand why I like playing very loud music.
10. I don’t understand. ….. you repeat the question, please?