問題詳情
17. Before a new invention is mass-produced and put on the market, the manufacturer will make a survey of its sales____to see if it can make a profit.
(A)announcement
(B) potential
(C) cosmetics
(D) interaction
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)