I want to help her but don't know what I can do or----- to s

I want to help her but don't know what I can do or----- to s I want to help her but I don't know what I can do to her I don't know what i can do to help her.（改为同义句） I don't--- -- I want to help her .But I can't think of any (s ) to her tro en.She is very busy,i want to help her .but I don't know ___ i want to buy a mobile but i don't know whether or what styl I want to cry!I don't know what can i do!I'm very sad! I understand,but,I don't know what to do? i don't want to know what it's been. i want to know what it I don't know （）.can you help A.what to do it. I don't know what I should do ,but I want to have a try.语法没错 She looks very sad.I want to help her but I don't know____to