Idon't know which hat was his 和 Idon't know which hat his wa

He didn't know which hat was his.还是应该用：He didn't know which The little boy did not know ____.A.which hat was his B.which Sorry,Idon't know意思 -Shall I tell john about it?-No,you ______.Idon't know his t The little boy didn't know____________ . C.which hat was his Shall I tell john about it?-No,you ______.Idon't know his te Idon't know what he (ture) felt Idon't know what was the matter还是I don't know what the matte I don’t know ,what idon’t understand . Idon't know ___book this is.A.who B.whom -Is there ___ interesting on TV?-Sorry,Idon't know. How do I live without your love?Idon't know