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问题: 1、He traveled to many mountain villages and saw ma

1、He traveled to many mountain villages and saw many poor children out of school. This experience _____ his life.
A would change B had changed
C was to change D was changing
选什么为什么,为什么不用B

解答:

A么?wuold表示推测吧。。。
、He traveled to many mountain villages and saw many poor children out of school.根据这个说明他有很多经验吧