一道简单选择题I don't know how many years ago____people began to stay at home and civilization beganA.it waa when B.it was that C.was it that D.was it when

一道英语选择题I think they know little about it,_______?A.don‘t they B.do they C.do I D.don't I 一道简单选择题I don't know how many years ago____people began to stay at home and civilization beganA.it waa when B.it was that C.was it that D.was it when I don't know. 一道英语选择题,很简单的.My brother don't know ( )you called.A. where B. that貌似是宾语从句. I don't know how I can swim well.（改为简单句） I don't know ________ _______ _______well.I don't know how I can swim well.（改为简单句）I don't know ________ _______ _______well. I don't know what I should do next.(改为简单句） I don't know( ) ( ) ( ) next. I don't know how I can get there. 改为简单句I don't know _ _ _ there. i don't know how i can make popcorn改为简单句I don't know -------- --------- make popcorn I don't know how I can findthe hospital的简单句是什么I don't know [ ] [ ] [ ] the hospital “i don't know you know i don't know I don't know when we shall start.(改为简单句) I don't know ____ ____ ____. 解一道[定语从句]的选择题I don't know the reason _________ he's come so late.A.for whichB.whyC.all the above I don't konw which one i will choose.I don't know _________one_______choose.改成简单句怎么改啊 sorry,I don't know. i don`t know much I don't really know. 英语；I don't know I don't know miss