Modal auxiliaries

Choose the correct modal auxiliary.

1. (Could/Mustn´t) I look at your map, please?

2. I´m so excited. I (can´t/shouldn´t) wait to see you.

3. You (should/shouldn´t) book before. It´s better.

4. We (couldn´t/needn´t) bring a camera. Our teacher has one.

5. I (can´t/may) open the door. It´s locked.