when he opened his bag on the train,he found that he------to put the clean shoes in
题目
when he opened his bag on the train,he found that he------to put the clean shoes in
A forgot B forget C had forgot D would forget选那个那,我选C但是自己说不清楚为什么
答案
C
从上下文看,因为前面是过去时（打开包）,这里就应该用过去完成时（忘记带干净鞋子在打开包之前就已经发生了）
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