Do you know_____for advice when we have problems?You can talk to your parents or teachers A wDo you know_____for advice when we have problems?You can talk to your parents or teachersA who to talk B who we can talk C who to talk to D who can we talk to那么为什么where to live(in)要把in省去？

C 因为who to talk to 中的who 是代词作talk to 宾语，而where to live 中的where 是副词作live 的状语，相当于which place to live in

D who can we talk to

b where是副词

C
talk to sb about sth 向某人诉说某事
补充：
live in 后面需要接宾语的，where是副词，不能作宾语，因此说where to live是正确的
a big house to live in, 此时就必须有in， 因为其逻辑宾语是house。

选Ctalk 是不及物动词 后面的 to 不能省略.Do you know 后的宾语从句应是陈述句语序,因此应是：who we can talk to 因此D不对特殊疑问词引导的宾语从句 = 特殊疑问词 + to do 因为 where 是副词 where to live = wha...

C
宾语从句是陈述句语序，故排除D，另外，TALK 是不及物动词，接宾语时要用TO/WITH 连接，即TALK TO/ WITH SB ，再排除A与B
补充：因为WHERE 是副词，副词前不能用介词

C who to talk to
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