permission, obligation, necessity

It's compulsory for motorcyclists to wear a helmet. = You _____ wear a helmet on a motorbike.

• have to

• need

• should

We regret buying such a big house. = We ______ such a big house.

• shouldn't buy

• shouldn't have bought

• don't need to

I couldn't wear jeans to work in my previous company. = I ___ wear jeans to work in my previous job.

• shouldn't

• wasn't allowed to

• don't have to

Our teacher says we should always speak English in class, but not all of us do. = We ___ in class, but not all of us do.

• must speak English

• are supposed to speak English

• have to speak English

Don't be late. The class always starts on time. = You ____ late. The class always starts on time.

• had better not be

• don't need to be

• needn't be

We're going on holiday so we can't come to your wedding. = We ___ to your wedding as we're going on holiday.

• aren't allowed to come

• aren't meant to come

• won't be able to come

The best thing to do would be to apply for a transfer to a different department. = You really __ for a transfer to a different department.

• ought to apply

• have to apply

• might apply

We took sandwiches, but they weren't necessary. = We ____ sandwiches.

• needn't have taken

• shouldn't take

• oughtn't to take

You cannot use mobile phones in this carriage. = ____ mobile phones in this carriage.

• You shouldn't use

• You don't need to use

• It is not permitted to use