‘Why don’t you put a better lock on the door?’ said John.8/21‘Why don’t you put a better lock on the door?’ said John.John suggested to put a better lock on the door. John asked why not putting a better lock on the door. John suggested putting a better lock on the door. John made us put a better lock on the door. Giải thíchĐáp án đúng: C Dịch: John gợi ý đặt một cái khóa tốt hơn ở cửa.