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Mrs.Brown is supposed _____ for Italy last week.

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Mrs.Brown is supposed _____ for Italy last week.
A) to have left B) to be leaving C) to leave D) to have been left
How to choose,translate and why?Thanks.
Mrs.Brown is supposed _____ for Italy last week.
A 布朗小姐本应该上星期动身前往意大利的.(实际上没去)
be supposed to后面接“have + 过去分词”时,表示“本应该做某事而没做”.
如:
You are supposed to have handed in your homework by now.
现在你应该已经把作业交上来了.
He is supposed to have arrived an hour ago.他应该一小时前就到了.