Moyan has won the Noble Prize in Literature, which has made him world-famous, but before that no one could have imagined how great a role he _______ in the literary world.

A．had played

B．has played

C．is playing

D．was to play

哪项病原体在子宫内感染时，有可能引起胎儿中枢神经系统病变（）①风疹病毒②流感病毒③乙型肝炎病毒④巨细胞病毒⑤弓形虫

A.①、②、③

B.①、②、⑤

C.①、①、⑤

D.②、③、④

E.③、④、⑤