Obligation, Suggestion, and Advise

It's not obligatory to wear a uniform when you submit your homework. You ________ wear one.

• must

• have to

• shouldn't

• don't have to

Slow down or we're going to have an accident. You _______ drive so fast.

• should

• shouldn't

• ought to

• oughtn't to

Billy : Are you going to the party?

Sally: I'm not sure. I _______ go.

• have to

• don't have to

• might

• mustn't

Where's the toilet? I ________ go.

• have to

• might

• shouldn't

• mustn't

Where is your phone? I _______ use it.

• have to

• should

• may

• must

You _______ do your homework on Saturday morning. That way, you'll have the rest of the weekend free.

• ought to

• must

• might

• shouldn't

You ______ be horrible to your sister. It makes her very sad.

• must

• mustn't

• have to

• shouldn't

Tomorrow's holiday. We _______ get up early.

• must

• mustn't

• have to

• don't have to

You should take an umbrella. It _______ rain.

• has to

• might

• should

• shouldn't

If you go sailing, you _______ wear a life jacket. The sea is very dangerous.

• must

• mustn't

• may

• might