—How do you deal with the disagreement between the company and the customers?
—The key _______ the problem is to meet the demand _______ by the customers.
A. to solving, making B. to solving, made
C. to solve, making D. to solve, made
—How do you deal with the disagreement between the company and the customers?
—The key _______ the problem is to meet the demand _______ by the customers.
A. to solving, making B. to solving, made
C. to solve, making D. to solve, made
B
key to(…的关键)中 to 是介词，应接动名词；又因名词 demand 与 make 是被动关系(make demands 提出要求)，另有 by 这一标志词暗示，用过去分词作定语。