Modal auxiliaries- English

Choose the correct modal auxiliary.

6. I (needn´t/can) see the London Eye so we´re almost there.
7. This is a supermarket. You (mustn´t/must) take the dog in!
8. We (can´t/must) climb this mountain. It´s so cool!
9. Tomorrow´s free so I (needn´t/must) do my homework today.
10. That´s a great computer game. (Mustn´t/May) I borrow it?