请写出选择原因Anna was reading a piece of science fiction,completel

请写出选择原因
Anna was reading a piece of science fiction,completely----to the outside world
a having been lost
b to be lost
c losing
d lost
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阿贲94 花朵

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D.过去分词表示被动,做状语.

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书蔓 幼苗

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D

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