He is away to spend his holiday.He's gone either to Hangzhou or to Wuhan but I'm not sure ____
问题描述：
He is away to spend his holiday.He's gone either to Hangzhou or to Wuhan but I'm not sure ____
答案是有which和where,想问问大家为什么不能用which啊?
答
where 因为用which时应该在前面加一个to而where直接刻作状语不用加to!