问题
选择题
The survey __________ our school last month shows that about 2 percent of the students are addicted to Internet games.
A．conducted
B．having been conducted
C．conducting
D．to be conducted
答案
答案：A
动词conduct与主语the survey之间存在着动宾关系，所以需用被动形式，依据last month可知，该动作发生在过去，排除CD。而B项答案不能作定语。conducted在此作定语，相当于which was conducted。