1. Let's go
2. Let's turn off
3. Let's sit down
4. Let's close
5. Let's stop

Ответ:

1. Come on. Let's go.

2. It's late. Let's turn off the TV and go to bed.

3. I'm tired. Let's stop.

4. It's very cold on here. Let's close the window.

5. There's a service station. Let's sit down and have a cofee.