He didn't know which office room_____.

He didn't know which hat was his.还是应该用：He didn't know which He didn't know ( Mr white didn't know i was inhis office.He was too busy to n he didn't know how he could get to the post office(改为同义句） he The man didn't know which car he should buy (保持原句意思） Do you know the reason why/for which he didn't come?这句话的意思? Tom had to buy ___these CDs because he didn't know which one the man didn't know which gift he should choose.=the man did Stuck in the landstorm,he didn't know which to take .前后两个句子之 He didn't know which pet ----a.get b.got c.to get 选择He didn't know ( )about it He didn't know what to do next.He didn't know what he ____ _