No one knows anything about his background, do they?   → Nothing....................................

Để viết câu trả lời cho câu hỏi trên, bạn có thể sử dụng từ khóa "Nothing" để bắt đầu câu trả lời. Dưới đây là một số cách làm:

1. Nothing is known about his background, is it?
2. Nothing has been revealed about his background, has it?
3. Nothing can be said about his background, can it?
4. Nothing has been disclosed about his background, has it?
5. Nothing is known about his background, is there?

No one has any knowledge of his background, do they?

Do any of us know anything about his background? No, we don't.

There is no information available about his background, is there?

His background is a complete mystery to everyone, isn't it?