Modal verbs of obligation and advice

Our teacher doesn´t like mobile phones. We ______ switch them off during lessons

• have to

• has to

• don´t have to

• doesn´t have to

I know that I must work hard for this test. You ____ to tell me!

• mustn´t

• don´t have to

• doesn´t have to

• have to

My sister is ill. She _____ stay in bed.

• mustn´t

• should

• shouldn´t

• don´t have to

Your room is terrible! You _____ tidy it up !

• mustn´t

• don´t have to

• has to

• should

Mario´s english is perfect. He ______ study for English exams.

• doesn´t have to

• must

• has to

• mustn´t

I´ve got a headache. I _____ take an aspirin.

• should

• must

• have to

• don´t have to

You _____ go swimming if you don´t know how to swim.

• don´t have to

• have to

• mustn´t

• must

A:I´m sorry I can´t join you.

B: Don´t worry! You _______ to come

• have to

• don´t have to

• mustn´t

• doesn´t have to

If you want to become a teacher, you ______ study hard.

• must

• don´t have to

• shouldn´t

• has to

I ______ get up early every morning to go to work

• has to

• have to

• mustn´t

• should