I _________ run very fast. I'm the fastest girl in the class. (can, should or must)
can
We __________ eat fruit and vegetables. They are healthy foods. (should or shouldn't)
should
You __________ play with fire. (should or shouldn't)
shouldn't
You _________ keep quiet in the library. (must or mustn't)
must
You _________ throw rubbish around. (must or mustn't)
mustn't
John ________ swim. He hates water. (can or can't)
can't
Jill _________ drive. She's a taxi driver. (can or can't)
can
It's hot. You _________ open the window. (can, should or must)
should
You ________ go to class late. Teacher will be angry! (must or mustn't)
mustn't
You __________ wear a helmet when riding a motorbike. (can, should or must)
must
It's cold. You __________ put on a coat and a scarf. (should or shouldn't)
should
Can elephants fly?
No, they can't.
Should he watch TV all day?
No, he shouldn't.
What should he do in the morning?
He should get up early.
What can't he do?
He can't ride a bike.
What can Mary do?
She can play the piano.
