IV. Viết câu hỏi cho các từ gạch dưới trong các câu sau.
1. He has to wear a hard hat (to protect his head).
=>Why does he have to wear a hard hat?
2. I had (a bad cold) yesterday.
=>What did you have yesterday?
3. I stayed at home (because I had a toothache).
=>Why did you stay at home?
4. She is (teaching Math) at the moment.
=>What is she doing at the moment?
5. They are waiting for (the doctor)
IV. Viết câu hỏi cho các từ gạch dưới trong các câu sau:
1. He has to wear a hard hat (to protect his head).
=>Why does he have to wear a hard hat?
2. I had (a bad cold) yesterday.
=>What did you have yesterday?
3. I stayed at home (because I had a toothache).
=>Why did you stay at home?
4. She is (teaching Math) at the moment.
=>What is she doing at the moment?
5. They are waiting for (the doctor)
=Whom are they waiting for?
