6 Complete the sentences with the words in the box.

can't , don't have to , might , must , mustn't , will

1. We ................. book tickets. They'll be lots of spaces for the classsical concert - there always are.

2. I don't think she .................. come tonight. She said she was feeling tried.

3. I'm sorry but you ..................................... park your car here. These spaces are staff not visitors.