【题目】Mary couldn’t________ the terrible working conditions in that factory and resigned last week.
A. catch up with
B. keep up with
C. put up with
D. come up with
在线课程【答案】C
【解析】catch up with 赶上；追上；keep up with 和……保持联系；put up with 忍受，容忍；come up with 提出；想出。句意是：Mary不能忍受那家工厂的恶劣的工作条件就辞职了。