Why didn’t you tell me about your trouble last week? If you ___ me, I could have helped.
A．told
B．had told
C．were to tell
D．would tell

参考答案：B 答案解析： 从第一句可知是对过去发生的事情进行虚拟，表示与过去事实相反的情况，句型结构为if+主语+had done，主语+would/could/might/should+have done，故选择B。