Question

【题目】-- What were they doing at that time yesterday?
-- They .
A.play soccer
B.played soccer
C.were playing soccer

Answer 1

【答案】C
【解析】句意：——他们昨天的那个时候正在干什么? ——他们……。问句中强调昨天那一时刻，故答语用过去进行时，故选C。