Bonjour c'est un exercice pour demain que je ne comprend pas pouvez vous m'aider

Ex. 1 - Make positive sentences in the past simple, using the verb in brackets.
For example: 1 ........ calm
I was calm
.......

1. We (to be) happy last week
2. We (to go) to the beach yesterday
3. I (to eat) an ice cream while I (to be) at the beach.
4. When I (to be) home, I (to take) a bath.
5. I (to see) my friends in the park two days ago.
6. The girl (to sing) a beautiful song at the concert.
7. Last night I (to do) my homework.
8. My mum (to make) my bed this morning.
9. I (to swim) in the sea last month.
10. My dad (to wait) for the food at the restaurant.​