问题
选择题
Jack almost fell off the cliff, but managed to _____ until help came.
A．keep on
B．catch on
C．count on
D．hang on
答案
答案：D
hang on(="hold" fast, keep hold)牢牢抓住，抓紧不放：Help! I can't hang on much longer.(救命啊！我支持不住啦。)keep on(doing sth.)继续（做......）；catch on 理解；count on 指望，依赖。
本题译文：杰克差点从悬崖上掉下来，但得以抓住不放直到得救。