By the time I reached school , the bell had rung.
一根横线一个单词，其他答案都不对。
get to school,arrive at school 多了一个单词
before the time i arrived school，the bell had rung
At got had rung
At reach have rung
by reach has rung
这种填词题有很多种答案的……By the time I reached school , the bell had rung。比较好一点
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