Пожалуйста помогите поставить один общий 1 альтернативный и 3 специальных вопроса к предложениям .. 1 . You must be very careful in the Street.. 2. He cold buy this book in shop

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1) Must you be very careful in the Street?Where must you be very careful?Why must you be very careful in the Street?What time must you be very careful in the Street?2)Does he cold buy this book in shop?How does he buy this book in shop?Where does he cold buy this book?What does he cold buy in shop?