An official by some reporters on food problems in Shanghai yesterday.
A. is interviewing
B. is interviewed
C. was interviewing
D. was interviewed
网友回答
A. is interviewing
B. is interviewed
C. was interviewing
(答案→)D. was interviewed
解析：这里考核的是一般过去时的被动语态，其明显的特征是yesterday和by。
重点：official官员/官方的