he wanted to find a seat to sit down还是sit on?不管上一个句子用哪一个,为什么he entered the lecture hall hoping to find a seat to sit on这个句子用sit on而不是down,

问题描述:

he wanted to find a seat to sit down还是sit on?
不管上一个句子用哪一个,为什么he entered the lecture hall hoping to find a seat to sit on这个句子用sit on而不是down,