宾语从句的语序与连接词 — 英语词汇题
题目
下列各句中有一处错误，请找出并改正（注意宾语从句的语序与连接词）：
(1) I don't know where does Tom live, so I can't send him the letter.
(2) Could you tell me how can I improve my communication skills?
(3) He asked me that I had received his message or not.