Choose the best answer to complete the sentence.
You _____ pick up flowers in the school garden.
must
mustn't
can’t
should
Choose the best answer to complete the sentence.
I ______ watch TV late at night. My parents say I must go to bed early.
can't
must
can
don’t have to
Choose the best answer to complete the sentence.
I _______ do my homework. My teacher said so.
can
mustn't
have to
don't have to