a. Complete the sentences with the words in the box.

1. I think the Star Wars films are great — everyone should go and see them!

2. I’m bored — I’ve got nothing to do!

3. This morning someone phoned me, but I have no idea who it was!

4. I was happy in the English lesson because I understood everything the teacher said.

5. I put my magazine somewhere, and now I can’t find it!

6. He found lots of shirts in the shop, but none of them were the color he wanted.

7. I told a great joke this morning but no one laughed!

b. Complete the sentences with mustn’t or don’t/doesn’t have to.

1. Tomorrow’s a holiday, so we don’t have to go to school.

2. I understand — you don’t have to explain everything.

3. You mustn’t eat in class — it’s a school rule.

4. Hurry up, Sally — we mustn’t miss the bus.

5. My sister’s revising for her exams, so she doesn’t have to do any housework.

6. Mum and Dad told us we mustn’t get home later than midnight.