What you at eight yesterday evening?A. have doneB. did doC. were doingD. are doing

问题补充：

What you at eight yesterday evening?

A. have, done

B. did, do

C. were , doing

D. are, doing

答案：

A. have, done

B. did, do

(答案→)C. were , doing

D. are, doing

解析：句意：昨天晚上8点你在做什么？题中有明确的过去时间at eight yesterday evening表示点时间，故用过去进行时，故选C