what are you doing here,peter?You are____ to be at home .doi

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what are you doing here,peter?You are____ to be at home .doing your homework.
A used B supposed C known D added 详细解答一下

大意是问petter 你在干嘛呢～你不是应该在家做作业吗?
A used to be 被用作
B suppose to be 应该是
c known to be 为...所知
D added to be 加入
therefore ,the answer should be B.

what are you doing here,peter?You are____ to be at home .doi what are you doing here? what are you doing here You seem to be quite feel at home here what are you guys doing here 口语交际What are you doing here what the hell are you doing here? What are you doing in the home? what are you doing to what are you doing+副词是不是表示“你正在在做什么的动作” 例如：What are you doi Peter: What are you doing for vacation, Steven? 你做这个干什么?用英语怎么说?what are you doing that for 还是what do you doi