Question

【题目】—Were you at Mary’s party last night?

—No, I ____________ my sister. She met with difficult problems.

A. help B. am helping

C. have helped D. was helping

Answer 1

【答案】D

【解析】

试题分析：句意：——昨晚你在Mary的生日晚会吗？——不，我正帮助我的妹妹。她遇到了难题。据you at Mary’s party last night?和语境故句子用过去进行时，故选D。