Susan may have missed her train, in case she won’t arrive for another hour.
A. that
B. what
C. which
D. whose
网友回答
A. that
B. what
(答案→)C. which
D. whose
解析：考察定语从句。本题定语从句的先行词是指前面一句话的内容，which case就是指代前面这句话的内容，做介词in的宾语。That不能放在介词的后面，what不能引导定语从句，whose不能指代一句话的内容。句意：Susan一定错过了她的火车，在这种情况下，他再过一小时也到不了。故C正确。