Modals of obligation and prohibition

You ... help me with the dishes, but I would appreciate it if you did.

• mustn't

• don't have to

• have to

• must

Smoking is bad for your health. You ____________ smoke so often. 

• can
• must
• should
• shouldn't 

Dennis! You ... hit your sister ever again!

• mustn't

• don't have to

• have to

• must

She has a very high fever. She ... visit the doctor at once!

• have to

• doesn't have to

• has to

• must

You ________ speak English in Pamela's classroom.

• have to

• mustn't

She _________ do her homework tonight because the teacher won't check it until next Monday.

• don't have to

• doesn't have to

• must not

This soup is delicious! You _____________ try it too.

• can

• must

• mustn't

• should

I don't know what to do...

• I should talk to somebody

• I have to talk to somebody

• I must talk to somebody

• I can't talk to anybody