—Whatareyouthinkingabout?—Thingsarealwayschanging,sowen...

问题详情：

—What are you thinking about?

—Things are always changing, so we need a more _______ decision-making system.

A. permanent                  B. sensitive                 C. specific                 D. flexible

【回答】

D

知识点：形容词

题型：选择题