She _____ the letter when she _ she ______ it to the wrong address.

A. had already posted – realized – had sent

B. had already posted- realized- sent

C. already posted- had realized- had sent

D. already posted- realized- had sent

Đáp án
A. had already posted – realized – had sent

Câu hỏi thuộc Bài tập:

She ___________ the letter when she ___________ she __________ it to the wrong address.