The rise of oil prices made scientists search for new energy resources oil．
A. replace
B. replacing
C. to replace
D. replaced
网友回答
A. replace
B. replacing
(答案→)C. to replace
D. replaced
解析：考查非谓语动词。句意：油价的上上升使科学家们寻找新的能量资源来代替石油。这里用不定式to replace，表示目的状语。故选C。