He didn't know which office room_____.为什么用to send it to,而不用to have it sent to

He didn't know which hat was his.还是应该用：He didn't know which hat his was. the man didn't know which gift he should choose.=the man didn't know __ __ __ __. He didn't know to choose which one.该为He didn't know which one to choose.求原因?one后为什么加to The man didn't know which car he should buy (保持原句意思）The man didn't know which car （ ） （ ）每括号限填一词 He didn't know which pet ----a.get b.got c.to get Do you know the reason why/for which he didn't come?这句话的意思? He didn't know which office room_____.为什么用to send it to,而不用to have it sent to 请定语从句do you know the reason for which he didn't come还原成简单句. He didn't know the reason__she got angry.A for that B for which C of which D which为什么选B 不选A He didn't know how he could get here He said he didn't know it yet 怎么翻译 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 what he should do.(改为简单句)He didn't know ___ ___ ___. He didn't know when he would start.(改为同义句） He didn't know （ ） （ ）（ ） He didn’t know _________ bus to take when he wanted to go to that famous five-star hotel.A：what B：which C：where D：why didn't he know the sun (rise) in the east?