sdiscoveryhashad的精選

問題詳情： --Thedoctor’sdiscoveryhashad__profoundeffectonmankind.--Soithas.Ithasmade__greatdifferencetoourlifespan.A.the;a  B.the;the  C.a;a  D.a;the【回答】C知識點：冠詞題型：選擇題...