You __________ book the concert tickets soon before it sells out!
ought to / should / had better
__________ I eat the last slice of cherry pie?
Can / May
I ___________ told her the truth. I'm going to regret it!
shouldn't have
___________ you help me find Mrs. Simpson's class, please? I'm new here.
Would
You _____________ tell anyone what I've said, or I'll get into trouble.
mustn't
The others are arriving at 8pm. You _____________ be here before then.
don't have to / needn't
I'm tired. I ____________ have a rest for a minute.
have got to / must
Lynn isn't here; she _____________ be at the dentist's.
may / might / could
After all the extra training they ____________ to play better by now.
must be able / ought
Everyone's going to go to the Halloween party, so it ____________ a lot of fun.
(will be *)/ should be / ought to be
Who is Mary and Steven speaking to? _______________ that be our new teacher?
Could / Might
He's given up football to play baseball, but that _______________ the right decision.
mightn't be / may not be
Oh dear, she's been waiting a long time. He ___________ come to dinner!
might / may not
You spend too much time on your computer. You __________ spend more time outdoors.
should
You spend too much time on your computer. You __________ to spend more time outdoors.
ought
My parents were very strict when I was young, so I __________ stay out late.
couldn't
