30．The novels written by the author sell best, but five years ago no one could have imagined how great a role he 　　　in the literary world.

　　　 A．was playing　　　　 B．played　　　　　　　　 C．was to play　　　　　 D．had played

29．He turned down the request of his friend because it was　　 　the limit of his power.

　　　 A．beyond　　　　　　　 B．over　　　　　　　　　　 C．off　　　　　　　　　　　 D．above