“You don’t look well. You _______ see a doctor.”
should
shouldn't
must not
must
You ______ be careful with knives.
must
don't have to
Phelps ___________ swim when he was born
can
can't
couldn't
could
Visitors __________ smoke.
don't have to
mustn't
You ________ spend all your money when you go shopping.
shouldn't
must
should
couldn't
The school rules say that we _____ use our cell phones in the classroom.
must not/ mustn't
Phelps couldn’t swim when he was born but he _________ swim really fast now.
couldn't
can
could
can't
You _____recycle old appliances.
should
must not
You _______ turn off your cell phones during the test.
shouldn't
must not
must
should
John ______ play video games; he doesn't have a computer.
can't
couldn't
When the traffic light is red, you ______ go on.
mustn't
don't have to
Your hands are dirty; you _____ wash them.
should
Cats cam climb trees but elephants _________ do it.
can
could
couldn't
can't
You ____ touch electric sockets with wet hands.
don't have to
must not
He _____ use a laptop, he doesn't know how.
can't
can
You _______ drink alcohol, you can have a soft drink.
mustn't
don't have to
If you like, you _____ use my computer.
have to
can