Sure! Here are the rewritten sentences:

11. How many schools are there in your hometown?
12. I don’t have any information about the trip.
13. Are there any ways to cure rabies?
14. I have never seen any aircraft before.
15. There aren’t any eggs; I must buy some for the fridge.

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For the additional exercise, here are the answers:

1. How much time does it usually take you to prepare a dish?
2. My mother didn’t give me any help with my homework.
3. A number of students have participated in intensive language programs abroad.
4. We had a wonderful time there.
5. Mother bought a bunch of bananas yesterday.
6. If I have only a little homework, I can play with you.
7. You have told too many lies; I won’t trust you again.
8. Each of the following sentences has a mistake.
9. My teeth have been brushed twice every day.
10. How much does the shirt cost?
11. You shouldn’t drink too many sugary drinks. They're bad for you.