Tom said to the girl: "When did you have this picture taken?'' => Tom asked __________.
Tom said to the girl: "When did you have this picture taken?''
=> Tom asked _______.
Đáp án: Tom asked the girl when she had had that picture taken.
Giải thích: Câu gián tiếp dạng wh-qs: S + asked (O) + wh-words + S + V (lùi 1 thì)
Dịch: Tom hỏi cô gái đã chụp bức ảnh đó khi nào.