Modale verbs - modal auxiliaries

Choose the correct modal auxiliary.

1. You (shouldn´t/can) buy that dress. It´s too expensive.

2. I (must/can´t) play the drums because I don´t have any.

3. Mum (needn´t/should) buy any apples. We have some.

4. Jake (couldn´t/must) check his emails yesterday.

5. (Must/May) I go to the concert, please?