You ________ eat a lot of junk food if you want to be healthy. (x)
must not/musn't
You ________ talk with your mouth full. (x)
Must not/ Musn't
I _____________ forget to call my mom on her birthday. (x)
Must not/ Musn't
They ____________ attend the party if they don't want to. (x)
Don't have to
You ________ wear a helmet while riding a bike. (✓ )
Must
I ____________ wake up early tomorrow. It's Sunday. (x)
Don't have to
He ________ forget his passport when he travels abroad. (x)
must not / mustn't
They ________ clean the house today, we can do it tomorrow. (x)
Don't have to
Halil _________ go to work tomorrow, it's a national holiday. (x)
doesn't have to
The doctor said that I _____________ exercise regularly to stay healthy. (✓ )
Must