Phelps ___________ swim when he was born
couldn't
could
can
can't
Phelps couldn’t swim when he was born but he _________ swim really fast now.
can
could
couldn't
can't
Cats cam climb trees but elephants _________ do it.
couldn't
can't
can
could
I like Sundays because I _____ go to work.
mustn't
don't have to
When the traffic light is red, you ______ go on.
don't have to
mustn't
You _______ drink alcohol, you can have a soft drink.
mustn't
don't have to
Visitors __________ smoke.
mustn't
don't have to
It's optional. We _____ to go if you don't want to.
don't have to
mustn't
He _____ use a laptop, he doesn't know how.
can't
can
She _____ send an email until yesterday.
can't
couldn't
You ______ be careful with knives.
don't have to
must
If you like, you _____ use my computer.
have to
can
John ______ play video games; he doesn't have a computer.
can't
couldn't
You _____recycle old appliances.
should
must not
You ____ touch electric sockets with wet hands.
don't have to
must not
Children ____ play with electricity.
shouldn't
can't
