that 在宾语从句中不但当任何成分,没有实际意义,通常可省略.what在宾语从句中坐助于或宾语,有实际含义.
that为引导词，本身没意思，口语中常省略。what=the thing (that...)起先行词和引导词双重功效。You can choose what you like.=You can choose the thing(s) that you like.祝你进步！开心每一天！
