he asked me _____ I wanted to go to Beijing by train or by plane .

问题描述:

he asked me _____ I wanted to go to Beijing by train or by plane .
为什么要用whether 而不用if

这个用什么都行
如果有or not用wherther
望采纳可追问我写if错的其实我绝对吧你用wherther更好
因为有时不能用if
却什么时候都能用wherther好吧!谢啦