来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/22 07:15:02
高中英语非谓语动词单选题.
On reaching the top of the mountain,we were pleased to find the tree ____ five years ago had grown tall.
A.planted B.having been planted
请大侠解释下这两个选项的区别.什么时候可以选B?
A 注意空格后面是tree ____ five years ago 说明是五年前中的那棵树
而B的话应该改为这样tree ____ for five years
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