When you go on a holiday, it's always a problem to decide_________.
A. where to live B. where to live in
请教老师, A和B都是对的吗?如果都是对的,有无in有何区别?谢谢老师。
When you go on a holiday, it's always a problem to decide where to live. (where 是连接副词,副词不需要介词)
When you go on a holiday, it's always a problem to decide what place to live (in). (若是名词,可以加 in,也可以省略)
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