When he opened his bag on the train.he found that he ( ) to put the clean shoes in.
A.Forgot
B.Forget
C.Had forgotten
D.Would forget
正确答案是C
When he opened his bag on the train.he found that he ( ) to put the clean shoes in.
A.Forgot
B.Forget
C.Had forgotten
D.Would forget
正确答案是C