Answer Key

Exercise

You have already visited this section on 2015-02-23 at 6:15.

Fill in the missing modal verbs.
  1. They were taken aback to see me. They  [must] have expected somebody else. 
  2. People  [ought, have, need] to be warned of the danger of swimming off this beach. 
  3. Shhhh! Don't make so much noise! We  [mustn't, shouldn't] wake the baby! 
  4. It's not easy, I know. But it's getting better. And it  [should] be fine next week. 
  5. The TV is playing and there is mess on the table. Somebody  [must] have been here before me. 
  6. Yesterday I  [had] to cram all day for my English final. I didn't get to sleep until after midnight. 
  7. Why didn't you answer the phone? I let it ring more than 20 times! - - - I was having a shower, so I  [might not, may not] have heard. 
  8. You  [should] have paid it all at once. You would have received a discount. 
  9. I don't know where Carl is. He  [may, might] have taken little Ben to the movies or the zoo. 
  10.  [don't have, do not have] to go to work tomorrow because it is Memorial Day. The best thing about a day off from work is that I  [don't have, do not have] to get up at 6, I can sleep until noon if I want to.