Linda knows something about china,because she has been to china ___.

问题描述:

Linda knows something about china,because she has been to china ___.
A,twiceB,for a second timeC,two timesD,a second time,
选哪个,为什么,主要是A和C

A
两次c不是.也是两次的意思吗一次是once
两次是twice
三次及三次以上才用three times这样的