题目内容
What _____ are you guys doing? I am freaking out(我很不安).A. in earth B in the earth C. on the earth D. on earth
D解析:
固定搭配on earth究竟;到底。
固定搭配on earth究竟;到底。
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What _____ are you guys doing? I am freaking out(我很不安).