问题补充：
His life is in such a mess as leads to in an unpleasant cycle.
A. him caught
B. his being caught
C. him to be caught
D. his catching
答案：
A. him caught
(答案→)B. his being caught
C. him to be caught
D. his catching
解析：“他的生活一团糟导致了一个不愉快的轮回。” leads to 导致 to是介词同时“他”和caught 又是被动因此选择B。
