how to do it ,what to do的,好像有6、7个这样的句子,

l really don,t know _____ and _____.A.What to do,How to do B.what to do it ,how to do itC.what to do it ,How to do D.What wo do,how to do it I really don't know____nexta.how to do b.what to doc.what to do it I don't know___.A.what to do it B.what do C.have to do it D.how do She dosn't know ( ) A what she can do it B what to do it C how to do D how to do it He doesn't know next 1how to do 2what to do next 3how to do it I don't know_____next.I am really nervous.A.how to do B.how to do it C.what to do D.what to do it What to do用法I really don't know____about it.A.what to do B.how to do Mary feally doesn't know __about it.A.what to do B.how to do They said they hadn't decided__________?A.how to do B.what to do C.what to do it D.how do it 说理由哦 We can't fix this machine well.Can you show us______?A how to do B what to do C how to do it D what do it I don't know ( ).A.what to do it B.how to do it C.what to do D.to do what I don't know （）.can you help A.what to do it.I don't know （）.can you help A.what to do it.B.how to do it C.how to do D.to do how I don't know ------it today.1.what to do 2.how to do 3.to do what 4.to do how I's too late for school.I don't know___________A.what to do that B.how to do C.what to do D.How to do it what to do和how to do She feels sad.She doesn't koow ______________.A what to do B how to do it i don't know how to do it.为何要加It?而what to do 后则不加it? I really don`t know_____ A.what to do it B.how to do C.what to do D.how I do （ ）He doesn't know ( ).A.what to do.B.what he can do .C.how to do D.how to do it