This is the main use that the scientists make (___) of natural resources.A.it B.which C.use D./

This is the main use that the scientists make (___) of natural resources.A.it B.which C.use D./
This is the main use that the scientists make (___) of natural resources.A.it B.which C.use D./

This is the main use that the scientists make (___) of natural resources.A.it B.which C.use D./
答案是：D
that the scientists make of 是定语从句,修饰use.make use of 为固定短语,意思是“利用”

D./
make use of 利用

this is the main use that the scientists make _ of natural 最好的解释在这里 make use of 是固定搭配，表示利用……的用处 这里是

C
make use of 利用