39. "Genius" is a complicated concept, _ _ many different factors.
A. involved B. involving , C. to involve D. being involved
【答案】B
【解析】考查非谓语动词。concept与involve是主动关系，用现在分词。现在分词短语作非限制性定语。“天才”是一个复杂的概念，涉及了许多不同的因素。
40. The map is one of the best tools a man has _ _ he goes to a new place.
A. whenever B. whatever C. wherever D. however
【答案】A
【解析】考查连词的辨析。从句中有“地点a new place”作宾语，故排除BC选项。很显然本句是时间状语从句。句意：一个人无论什么时候到了一个新地方，地图就是他使用的最好的工具之一。
