We finally managed to make the customers of the quality of the vehicle.
A. pleased
B. convincing
C. convinced
D. satisfied
网友回答
A. pleased
B. convincing
(答案→)C. convinced
D. satisfied
解析：句意：我们最后设法让顾客对于车辆的质量信服。convince的基本意思是通过摆事实、讲道理或者出示证据等方法使人确信某一事实,侧重人的理性因素。
convince后面可以直接接人，如果表达“说服某人某事”可用“convince…of…”或“convince…that…”的结构。
be pleased/ satisfied with“对……满意”。
We hope to convince him of our sincerity.
We hope to convince him that we are sincere.
这里是make sb do sth 与convince sb of sth的被动形式sb be convinced of的综合考查，故选C