— No one answered when I phoned this morning. Where were you?— I for teeth in the dental c

问题补充：

— No one answered when I phoned this morning. Where were you?

— I for teeth in the dental clinic.

A. was being treated

B. have been treated

C. was treated

D. treated

答案：

(答案→)A. was being treated

B. have been treated

C. was treated

D. treated

解析：句意：—我今天早上打电话时没有人接听，你去哪里了？—我正在牙科诊所治疗牙齿。题中上下文的时态关系可以通过when的从句得出，表示过去正在做某事，用过去进行时，故选A