1.I'mbeginningtothinkwhethermygrandmotherwasrightwhenshecomplains,_____shefrequentlydoes,thatchildrennowadaysaren' cause答案为B,解释为插入语.我不能理解为何C为何错?2.ThemanagermadeTomabetteroffer_____.anwilfred’ anthatofwilfred’sanhemadewilfred答案为D,为何B错呢?希望能帮我详细解释,谢谢@!