He didn't know ___ use it was made of since he was too young.what 还是 that

He didn't know what he should do.(改为简单句)He didn't know ___ ___ ___. My brother didn't know where he could buy this book My brother didn't know ___ ___ buy this book ___ the meeting ,he would have attended.A If he knewB If he hadn't knownC Had he knownD If he didn't know He didn't know ___ use it was made of since he was too young.what 还是 that Coz I didn't know U ,Coz I didn't know me He has never flown a kite like that before,___?___,and he didn't know what a kite was until now.A.has he;Yes B.hasn't he ;YesC.has he;No D.hasn't he;No He didn't know how he could get here He said he didn't know it yet 怎么翻译 英语题! they go fishing 【three times a week】 对划线部分提问they go fishing 【three times a week】 对划线部分___ ___ ___ they go fishing2.he said he didn't know what he should do next 同义句he said he didn't know ___ ___ ___nex ''What is happening ouside?'' (用she didn't know作主语） She didn't know ___ ___ ____ outside. l didn't know which one I should choose.改为同义句:I didn't know which one ___ ___. 英语句子成分划分He didn't come.That is why he didn't know He didn't know what to do next.He didn't know what he ____ ____ next. He didn't know when he would start.(改为同义句） He didn't know （ ） （ ）（ ） 语法：Not until Mr Smith came to China ___ what kind of a country she is.A.he didn't know B.he knew C.did he know D.he could know didn't he know the sun (rise) in the east? he didn't know what to do .反义文句 He didn't know a world of English.翻译,