问题描述：
把下列句子变被动语态
11.you should keep the room clean and tidy.
12.He is going to foget his stories.
13.She finds her brother listening some popular songs.
14.could you mend my bike?
15.Does she return the dictionary to you?
16.He reports that the population of China is still growing all the time.
17.we'd better help them at once.
18.Do they spend too much money on the car?
19.They shouldn't take photos in the museum.
20.we always hear her sing some English songs.
11.you should keep the room clean and tidy.
12.He is going to foget his stories.
13.She finds her brother listening some popular songs.
14.could you mend my bike?
15.Does she return the dictionary to you?
16.He reports that the population of China is still growing all the time.
17.we'd better help them at once.
18.Do they spend too much money on the car?
19.They shouldn't take photos in the museum.
20.we always hear her sing some English songs.
问题解答：
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