问题补充:
A new supermarket in my hometown last month.
A. built
B. was built
C. has built
D. is building
答案:
A. built
(答案→)B. was built
C. has built
D. is building
解析:句意:上个月在我的家乡建了一个新的超市。这句话的主语是a new supermarket,根据句意可知,这里应该用被动语态;且句中有时间状语last month,所以应该用一般过去时的被动语态。故选B。