11. I'm sure that noise isn't a plane. = "That noise ______ a plane."
may be
must be
can’t be
might be
12. I'm sure you know a lot of people here. = "You ______ a lot of people here."
might knowing
may knowing
can’t know
must know
13. I'm sure Carl ate all the cookies. = "Carl ______ all the cookies."
must eating
must have eaten
can’t eat
might eats
14. It's possible Anima didn't tell the truth. = "Anima ______ the truth."
may has tell
must told
can’t tell
might not have told
15. I'm sure you're joking! = "You ______!"
must jokes
must be joking
may joking
can’t be joke
16. Maybe they're planning a surprise party! = "They ______ a surprise party!"
can’t be plan
might be planning
must planning
may planned
17. I'm sure she hasn't cleaned the bathroom. = "She ______ the bathroom."
couldn't have cleaned
may have cleaned
can't have cleaned
might cleaning
18. I'm sure they aren't talking about us. = "They ______ about us."
may talking
must be talked
might talks
can’t be talking
19. Perhaps Sam didn't see you. = "Sam ______ you."
must not saw
may sees
might not have seen
can’t seen
20. I'm sure they're wondering where we are. = "They ______ where we are."
might wonders
may wondered
can’t wonder
must be wondering
1. She looks tired. She ______ to bed late last night.
may goes
can’t go
must have gone
might go
2. I think he ______ be the new student. I’ve never seen him before.
can’t
couldn't
must
might
3. That ______ be Anna. She’s on her vacation in Japan right now!
must
might
can’t
may
4. The lights are on. Someone ______ be at home.
can’t
may not
goes to
must
5. They’re laughing a lot. They ______ be having fun.
may not
can’t
must
have
6. It’s very cloudy. It ______ rain later.
should
might
can’t
couldn't
