This is the main use that the scientists make of natural resources.
A. it
B. which
C. use
D. /
网友回答
A. it
B. which
C. use
(答案→)D. /
解析：不少考生一看到 “make...of”就意识到该空意义为“利用”,于是立即选择C或避免重复而选择A或B,其实 “make use of”结构已被创新,made的宾语use被提前作了定语从句的先行词,因此make后面无须再加宾语。故正确答案为D。