提问价钱：How much is the towel？
提问年龄：How old are you？
提问地点：Where do you read books？
提问程度：How much do you like science field trips?
提问宾语：What are you good at？
提问频率：How often do you have science classes？
提问表语：What are the hens doing？
提问数量：How many pigs are there？
提问表语：What are the young elephants doing？
提问动词：What do you do in the music room？
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