You ________ wear a helmet while riding a bike. (✓ )
must
doesn't have to
musn't
We ________ study for the exam next week. (✓ )
have to
must
has to
They ________ be at the airport by 7 am tomorrow. (✓ )
have to
must
don't have to
You ________ eat a lot of junk food if you want to be healthy. (x)
don't have to
doesn't have to
must not/musn't
He ________ forget his passport when he travels abroad. (x)
must not / mustn't
don't have to
have to
We ________ be quiet during the movie. (✓ )
have to
must
has to
She ________ go to bed early because she has an early class tomorrow. (✓ )
must
mustn't
have to
You ________ talk with your mouth full. (x)
must not/ Musn't
doesn't have to
don't have to
We ________ be on time for the meeting. (✓ )
must
have to
has to
They ____________ attend the party if they don't want to. (x)
mustn't
have to
don't have to
I ____________ wake up early tomorrow. It's Sunday. (x)
mustn't
doesn't have to
don't have to
We _________ study for the test because it's been cancelled. (x)
doesn't have to
don't have to
mustn't
They ________ clean the house today, we can do it tomorrow. (x)
doesn't have to
mustn't
don't have to
I _____ study for my exams this weekend. (✓ )
must
have to
mustn't
Halil _________ go to work tomorrow, it's a national holiday. (x)
must
don't have to
doesn't have to
I _____________ forget to call my mom on her birthday. (x)
don't have to
don't must
must not/ Musn't
