【题目】If these new measures don’t work, we’ll have to _______ our old system.
A. make up for B. come up with
C. break away from D. fall back on
在线课程【答案】D
【解析】本题考查动词短语。A. make up for弥补，补偿；B. come up with提出；C. break away from从……脱离；D. fall back on求助于，依赖，转而依靠。句意：如果这些新的措施不起作用的话，我们不得不求助于我们的老系统。D项符合语境。故选D。