1 I may not can't don't have to ride a bike. I always fall off 2 You look sick, you should can, may) see a doctor 3. Students (can, must, may) take exams twice a year 4. Sorry, I didn't have to, couldn't might not) come yesterday 5 One (must, may, could) move with the times. 6. I(may not, am not to can't) get you off my mind. 7. He was very busy but still he was able to, had to, was to) visit us. 8. If he saves enough money, he will be able to can, could) buy a car next year. 9 Isabella (might, can't, may) miss her dance class because she has a solo in the show next week 10. The government (wouldn't, might, should) protect it's citizens from invasions​