用括号中动词的正确形式填空“I______(explain)thistoyouseveraltimesalready,”saidtheteacher.“Ihopeyou________（understand)itnow.”Thenhelookedatalittleboyatthebackoftheclass.“_______you_______(listen),Jon

　　用括号中动词的正确形式填空

　　“I______(explain)thistoyouseveraltimesalready,”saidtheteacher.“Ihopeyou________（understand)itnow.”Thenhelookedatalittleboyatthebackoftheclass.“_______you_______(listen),Jones?”heasked.“Hereisasimpleproblem:"Sally______（work)inanofficeforthirty-fourweeks.Inthattime,she_______(earn)300poundsaweek.Howmuch________she________(earn)sofar?"

　　"Please,sir."Jonesanswered,"Icanonlyansweryourfirstquestion.I_____(notlisten)."