Chuyên đề 11: Câu hỏi đuôi

Mary had to look after her younger brother when her parents are on business,______? A. hadn’t she B. didn’t she C. had she D. did she

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Mary had to look after her younger brother when her parents are on business,______?

hadn’t she

didn’t she

had she

did she

Giải thích

Chọn B