Write questions to the underlined words

Write questions to the underlined words:
1. They were watching TV. →
2. He was writing a letter. →
3. Nick was singing at 2 o’clock yesterday. →
4. Pat was playing basketball. →
5. She was helping her brother. →
6. They were training in the gym. →
7. We were writing a test. →
8. He was riding a bike in the park. →
9. The cat was sleeping under the table. →
10. Liz was cleaning her room. →
11. Nick was reading a new novel. →
12. Ben was standing at the door. →