COULD or COULDN'T ?

When we were in Paris, I _____ see the Eiffel Tower, but I _____ go up.

The zoo is closed now, but you _______ visit it in the morning.

- _____ you take a picture with your favorite music band? - No, I _____. But I _____ get their autograph!

We _______ swim in the sea because there were sharks.

It was too hot, so I _______ stay at the beach.

This wildlife park is amazing, we _____ even touch some animals! But we _____ give them any food.

I forgot my phone at home, so I ______ take photos.

We ______ wear jeans in school last year, but now we can't.

We finished all the exercises, so we _____ leave the lesson early.

The weather was terrible, so we _______ have a picnic.

After my visit to the dentist I _____ eat anything for 5 hours.

David speaks English, so he ______ talk to people when he was travelling.