Choose the best answers to complete the following sentences, to identify one mistake or to choose the best rewritten sentences.

Câu hỏi

If I had known the reason why she was absent from class, I would have told you.

A. I knew the reason why she was absent from class, but I didn't tell you.

B. Unless I knew the reason why she was absent from class, I wouldn't tell you.

C. I didn't know the reason why she was absent from class, so I didn't tell.

D. Although I knew the reason why she was absent from class, I didn't tell you.

2023- GRAMMAR Test 1