Not only the students but also the teacher enjoying the film at 9 pm yesterday.
A. has been
B. was
C. are
D. is
网友回答
A. has been
(答案→)B. was
C. are
D. is
解析：昨天上午九点，不但学生们，老师也很喜欢这部电影。结合语境可知本句描述的是过去某时正在进行的动作，故用过去进行时态。当由not only but also连接两个主语时，谓语动词与最近的主语保持一致，the teacher是单数第三人称，故助动词用is的过去时态was，选B。