The soil ________ the dead leaves above．

Question

A. is made of B. made from C. is made in D. is made by

Answer 1

答案B
句意：“土壤是由上面的落叶腐烂而成的。”be
made
from“由……制成”，从成品表面看不出原料，be
made
of“用……制成”，从成品表面能看出原料，be
made
in
“由某地生产或制造”“产于某地”，in后接表示地点的名词，be
made
by“被……制造”是被动语态，by后接动作的发出者，根据题意，应选项B项。