著名学者胡绳说：“近代中国在20世纪初处于一个社会大变革时期，中国民主主义革命向新民主主义革命著名学者胡绳说：“近代中国在20世纪初处于一个社会大变革时期，中国民主主义革命向新民主主义革命转折，这是诸多因素共同作用的结果。”下列诸多因素中起决定作用的是（）

the following descriptionsboutmber Stevens is INCORRECT mber once sng bck-up for Gldys Knight. B．mber worked forBC Fmily’s new series before hercting creer. C．mber ws once singernd then becmenctress. D．mber is regrdedsn energeticnddorble girl.A．Amber once sang back-up for Gladys Knight．B．Amber worked for ABC Family’s new series before her acting career．C．Amber was once a singer and then became an actress．D．Amber is regarded as an energetic and adorable girl．

leB．W___ he cme to study in the university, he hs mde much progress in the study of English.While B．When C．Since D．fterA．WhileB．WhenC．SinceD．After