You ______ buy a ticket on Sundays. It's free.

You don't have to / mustn't stand on the desk. Otherwise, you'll break it.

Eva shouldn't have / didn't need to put on a party two days before New Year's Eve. Almost no one came.

You _______ tell anyone what I've just told you. It's a secret.

It was wrong of them to use the machine without asking for permission first. They .......... have asked for permission before using the machine. SHOULD

You mustn't / needn't look at other students' work.

You ________ do exercise every day. It's good for you!

He is on holiday, so he _______ get up early.

You _________ make more of an effort in class.

You ___________ call Maria. I know she misses you a lot.

I _________ study this weekend. It's my obligation as a student.

'But it was an accident!' 'Well, you should / would have been more careful.'

The company doesn't have to / mustn't do any more trials on the vaccine because it has been declared safe.