I ............ sing a song.
CAN
You .......... try rafting.It is very exciting!
SHOULD
She ........ climb trees when she was 6 years old.
COULD
You ......... have a visa if you want to go abroad.
MUST
You .......... feed the cat twice a day.
HAVE TO
If he study hard, he ...... past the exam.
MAY
I didn't see them today, they ......... be away but I'm not sure.
MIGHT
He ................ wake up early,he doesn't work today.
DOESN'T HAVE TO
You ............ smoke in public areas.
MUSTN'T
You ................... drink coffee too much.
SHOULDN'T
