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When I dropped the bread, I ( ) at once, but it was already dirty.
A、picked it up
B、picked up it
C、picked it
D、picked up
【正确答案】：A
【题目解析】：pick 代词 up，捡起 拾起，代词放在短语中间，句子含义面包掉地上，我立即捡起，但是它已经脏了。