问题补充：
Look at the trouble I am in. If only I your advice.
A. followed
B. would follow
C. had followed
D. should follow
答案：
A. followed
B. would follow
(答案→)C. had followed
D. should follow
解析：考查虚拟语气：if only要表示与现在事实相反的愿望，从句谓语一般过去时或过去进行时，表示与过去相反的愿望，从句谓语用过去完成时，表示将来没有把握或不太可能实现的愿望，用would (could)＋动词原形。这句话的意思是：看我现在的麻烦，我要是听你的建议就好了。说明是和过去相反的愿望，用过去完成时。选C。
