I don't know ______ to do it.A.what B.how C.where D.when 选哪个答案,请顺便区分一下四个答案

i don't know where i should goi don't know ______ ______ ______ 填空:I don't know what ______ ______ .I don't know where ____ ____. i don't know which sportswoman i should support.=i don' know ______ ______ ______ ______ 英语翻译I don't know _____ ______ _____next. .I don't know.Do you want ______? I don't know how this ______(发生) I don't know. “i don't know you know i don't know What does he like wearing I don't know.(合为一句) I don't know _____ _____ ______. I don't know where I can buy this kind of boots.同义句.I don't know ______ ______ ______ this kind of boots. I don't know what to see.(改为宾语从句） I don't know ______ ______ ______ ______He is a very ____(create) student 同义句改写：I don't know how to deal with the waste paper.I don't know ______ ______ ______ the waste paper. Do you know where Niagara ______(fall)is?Sorry,I don't know 英语翻译I don't know what day it is today ______ a ______. 与I don't know where your house is.的同义句I don' know the_____ ______. i don‘t know what to wear.改为同义句 i don’t know_____ I _____ ______. sorry,I don't know. i don`t know much