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

28．After driving for five hours, they arrived at　　　 they thought was the place th ey had been dreaming of.

　　　 A．what 　　　　　　　　 B．that　　　　　　　　　　 C．which　　　　　　　　 D．where

27．If you had worked hard, you ______ so anxious now．

　　　 A．are not　　　　 　　　　　　　　　　　　　　　　 B．would not have been

　　　 C．will not be　　　 　　　　　　　　　　　　　　　　 D．would not be

26．______ I'm willing to help, I do not have much time available．

　　　 A．While　　　 　　 B．When　　　　　　　　　 C．Once　 　　　　　　　 D．Since

25．The rise of oil prices made scientists search for new energy resources ______ oil．

　　　 A．replace　　　　　　　　 B．replacing　 　　　　 C．to replace　 　　　 D．replaced