问题
选择题
Scientists from different countries are trying to_______ a good way to solve the energy problem.
A．keep up with
B．come up with
C．catch up with
D．meet up with
答案
答案：B
题目分析：句意：来自于不同国家的科学家正在努力相处解决能源问题的好方法。A与……保持齐头并进B想出C抓住D碰见。根据句意选B。