问题描述：
填空 it _________________ (take) to the nearest post office. In the post office, all the letters ___
it _________________ (take) to the nearest post office. In the post office, all the letters _________________ (sort) by hundreds of post office workers.
it _________________ (take) to the nearest post office. In the post office, all the letters _________________ (sort) by hundreds of post office workers.
问题解答：
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