问题
选择题
Vehicle designers are well aware that they need to ______ the idea of cars that have a low environmental impact.
A．end up with
B．put up with
C．keep up with
D．come up with
答案
D
题目分析：考查固定短语。End up with结束；put up with忍受；keep up with赶上；come up with想起。句意：汽车设计师完全意识到，他们需要想出一个能制造出对环境低影响的汽车来。Come up with the idea想到这个想法，所以选D项。
考点 : 考查固定短语