问题描述:
英语关于once
i known that Great Wall is very beautiful.but i have
never been there ——
选项有before ago last year 和once 为什么选before而不选once,once不是有曾经的意思吗,before在这里也是曾经呀
i known that Great Wall is very beautiful.but i have
never been there ——
选项有before ago last year 和once 为什么选before而不选once,once不是有曾经的意思吗,before在这里也是曾经呀
问题解答:
我来补答展开全文阅读