_____ you understand these instructions?
Can
I _____ pick you up after school because I am working late tonight.
can't
We ______ go to bed early on Saturdays. Mom lets us stay up a bit later.
don't have to
The school rules say that we _____ use our cell phones in the classroom.
must not/ mustn't
_____ you play tennis when you were younger?
Could
We _____ always have a ticket when we travel on the bus.
must
Jake _______ work on his computer yesterday because it wasn’t working.
could not/ couldn't
I _______ go out right now. I am doing my homework!
cannot/ can't
Secondly, you _______ give out your personal information when you’re chatting online because you don’t really know the other person.
should
must not
Finally, you _______ open strange emails.
must not
should
Phelps ___________ swim when he was born
can't
couldn't
could
can
Phelps couldn’t swim when he was born but he _________ swim really fast now.
can't
can
could
couldn't
Cats cam climb trees but elephants _________ do it.
couldn't
can't
could
can
I like Sundays because I _____ go to work.
mustn't
don't have to
When the traffic light is red, you ______ go on.
mustn't
don't have to
You _______ drink alcohol, you can have a soft drink.
mustn't
don't have to
