______,  the runners crossed the finish line.
______,  the runners crossed the finish line.
A、Tiring
B、Tired
C、To be tired
D、They are tired
【正确答案】：B
【题目解析】：tired作定语,修释后面的runners,若选B.They are tired 与 the runners crossed...是两个单独的句子,如果没有关联词连接就不能用逗号隔开
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