For several years his ambition ________ to be a pilot. A. has been B. is C. was D. had been10/30 For several years his ambition ________ to be a pilot. A. has been B. is C. was D. had beenNhập câu trả lời ở đây0/3000 ký tựGiải thíchĐáp án Chọn đáp án A