What a strange man! He loves his wife, but _________ he often beats her．

A.at a time

B.at one time

C.at times

D.at the same time

答案及解析： D

解析：

at the same time“同时”；at a time“一次”；at one time“曾经，一度”。in time“及时；终究”。拓展：例如：I can eat thirty dumplings at a time．我一次能吃三十个饺子。I lived in the country at one time．我曾在乡下住过。He'll succeed in time．他终究会成功。