Question 33. I spoke to my sister. Then, I knew what she had experienced.

A. Having known what my sister had experienced, I spoke to her.

B. Only after I had known what my sister had experienced did I speak to her.

C. But for what my sister had experienced, I wouldn’t have spoken to her.

D. Hardly had I spoken to my sister when I knew what she had experienced.

Giải thích: Câu đảo ngữ: Hardly + had + S+ Ved/V3 + when + S + V + O.

Tạm dịch: Tôi vừa mới nói chuyện với em gái thì tôi đã biết được những gì cô ấy đã trải qua.