DO you have any idea___is actually going on in the classroom?A that B what C as D which

DO you have any idea___is actually going on in the classroom?A that B what C as D which

题目
DO you have any idea___is actually going on in the classroom?A that B what C as D which
答案
B what
what is going on 发生了什么事,固定搭配
翻译:你知道教室里到底发生了什么事吗?
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