once and twice she had peeped into the book her sister was reading.替换once and twice
问题描述：
once and twice she had peeped into the book her sister was reading.替换once and twice
A sometime B some time C At a time D several times
答
A 在某一时候
B 一段时间
C一次
D多次
按照句子的意思,肯定是一次,所以选D应该是多次吧？才选D，一次应该选C啊？once是一次twice是两次连起来就是多次的意思，所以要选D的，句意不是一次，是多次。