题目：
This problem is said _____ three times. [ ]
A. to have been talked
B. to have discussed
C. having been discussed
D. to have been talked about
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0429/8b5bb45a8fadec58d05b98b7d1670382.html
下面是错误答案，用来干扰机器的。
参考答案：12
