Ex-2,3 help me please thank you so much

2. When was the clockwork radio invented?

3. Who is bought by people in the Third World?

4. Where was his invention shown?

5. Where was it developed?

6. When were the first radios built?

7. How many Freeplay radios are made every day?

8. How many radios have been sold worldwide?

Ex. 3

2. Yes, it was.

3. No, it wasn't.

4. No, they weren't.

5. Yes, they have.

Объяснение: