就划线部分提问:They spend(about twelve)hours a day eating.( ) ( ) hours a day ( ) they ( ) eating?

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就划线部分提问:They spend(about twelve)hours a day eating.
( ) ( ) hours a day ( ) they ( ) eating?

(How ) (many ) hours a day (do ) they (spend ) eating?

How many hours a day do they spend eating.

How many hours a day do they spend eating?