The reason ____he was late was ____he had taken a wrong bus.A.why; becauseB.for; because ofC.why; thatD.for; that
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C解析试题分析：考查固定句型和短语从句。固定句型：The reason is/was that…原因是…；that引导表语从句。第一空是定语从句why he was late修饰先行词the reason.句意：他迟到的原因是乘错了公交车。故C正确。考点：考查固定句型和短语从句点评：固定句型：The reason is/was that…原因是…；that引导表语从句；另外当先行词是reason的死后，如果使用关系副词，要使用why。