1. I know a woman. She makes locks and key.

⇒ I know a woman who makes locks and key.

2. My mother helps me with my housework.

⇒ It's my mother who helps me with my housework.

3. That's man. I told you about him yesterday.

⇒ That's a man who I told you about yesterday.

4. The boy injured in the accident was taken to the hospital.

⇒ The boy who injured in the accident was taken to the hospital.

5. Did the boy visit his uncle last month?

⇒ The boy visited his uncle last month, didn't he?

~Good luck~

1. I know the woman who make locks and key

2. It's my mother that helps me with my housework

3. That's the man whom I told you about yesterday

4. The boy who was injured the accident was taken to the hospital

5. The boy visited his uncle last month, didn't he?( câu hỏi đuôi)