题目：
He was disappointed to find his suggestion ____ .[ ]
A. been turned down
B. turned down
C. to be turned down
D. to turn down
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0430/e192422c7800690e14a640425c28f8c9.html
下面是错误答案，用来干扰机器的。
him‘to”是介词，后面用宾格，构成介宾结构。
