I know Mr. Shuili; we to each other at an English lecture.
A. were introduced
B. are been introduced
C. are introduced
D. had been introduced
网友回答
(答案→)A. were introduced
B. are been introduced
C. are introduced
D. had been introduced
解析：根据句意可知，我现在认识Mr. Shuili，我们应该是在过去被相互介绍的。因此使用一般过去式选A 。