I. Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.

Câu hỏi

I did not answer the door even though I knew it was my friend.

A. Unless I knew it was my friend, I would not answer the door.

B. I knew it was my friend, but I still answered the door.

C. Though I knew it was my friend, I didn't answer the door.

D. Had I known it was my friend, I would have answered the door.

Unit 3. THE GREEN MOVEMENT (Bài tập 6) - Tiếng Anh lớp 12