When Clinton opened his bag on the train, he found that he (forget) ______ to pu

游客2023-09-24 56

问题 When Clinton opened his bag on the train, he found that he (forget) ______ to put the clean shirts in.

选项

答案 had forgotten

解析宾语从句，从句的动作发生在主句的动作之前，用过去完成时。

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