作业帮there are （many trees） behind the house对划线部分提问
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there are （many trees） behind the house对划线部分提问
What is there behind the house?
what behind the house there?
What's behind the tree?
给分啦！保证是对的！！
What is there behind the house?
当不知道所问的东西是单数还是复数的时候BE动词都用is