问题
选择题
The retired teacher is said to have returned from the USA, where he ______ by some of his old students.
A．would be visited
B．visited
C．had been visited
D．have been visited
答案
答案：C
题目分析：句意：据说这个退休的教师已经从美国回来了，在美国他的一些学生拜访了他。主语时态为一般现在是，非限制性定语从句中他被学生拜访，语态为被动，故排除A和B。“被拜访”这个动作发生在过去，故选用过去时态，排除D。故选C。