问题描述：
know 还是 understand
Not long after that ,She became mute and couldn't say any word.But she didn't （ ） that until she was five.
在一篇文章里,讲的是邰丽华,跳千手观音的那个,是填know还是understand?
Not long after that ,She became mute and couldn't say any word.But she didn't （ ） that until she was five.
在一篇文章里,讲的是邰丽华,跳千手观音的那个,是填know还是understand?
问题解答：
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