She said “I’m sorry, I didn’t reply to the letter.”

17/40

She apologized for not to reply to the letter.

She apologized for not to replying to the letter.

She apologized for not replying to the letter

She apologized for didn’t reply to the letter.

Giải thích

Đáp án đúng là: C

Giải thích: Cấu trúc aplogize for (not) doing something: xin lỗi vì đã (không) làm gì

Dịch: Cố ấy xin lỗi vì đã không trả lời thư.