– Who cleaned the room yesterday ? – I . A. did B. does C. wasD. is

问题补充：

– Who cleaned the room yesterday ?

– I .

A. did

B. does

C. was

D. is

答案：

A. did

B. does

C. was

D. is

解析：考查特殊疑问句。句意：昨天谁打扫的房间？我。根据上文提到时间状语yesterday,故回答时用一般过去时，句子结构是主谓宾结构，故选A项。