5. Change the following statements into tag questions.
1. People speak English all over the world.
2. Everything is ready.
3. Someone called me last night.
4. She's been studying a lot recently.
5. He hasn't been running in this weather.
6. He went to the party last night.
7. You never come on time.
8. Well, I couldn't help it.
9. You remembered to feed the cat.
10. Let's play tennis.