Look at the terrible mess I am in. If only I ________ your adv

Look at the terrible mess I am in. If only I ________ your advice.
A、should follow
B、have followed
C、had followed
D、would follow
【正确答案】：C
【题目解析】：此句的意思是看看我这一团糟，要是我听了你的建议就好了。If only表达虚拟的语气，句型中后面的谓语一般用表过去的时态。