The marathon runner raced ahead in the early stages of the race but he had overplayed his hand(过高估计)and had to ________ exhausted with only three miles to go．A.leave outB.let outC.drop outD.put out
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C解析考查动词词组辨析。句意：这位马拉松赛跑者在比赛开始阶段跑在前面，但他过高地估计了自己的力量，结果在离终点仅3英里时，跑得筋疲力尽而不得不退出比赛。