题干
They _______ in Shenzhen at that time(在那时). They were in Shanghai. （ ）
A：weren't
B：aren't
C：wasn't
答案(点此获取答案解析）
A
They _______ in Shenzhen at that time(在那时). They were in Shanghai. （ ）
A：weren't
B：aren't
C：wasn't
