There are fewer teaching positions left in big cities, at the same time there are shortag

发布时间：2020-08-16 15:51:37

There are fewer teaching positions left in big cities,      at the same time there are shortages of teachers in small towns．   
A. or
B. and
C. so
D. for

网友回答

A. or
(答案→)B. and
C. so
D. for
解析：考查连词。or 表选择关系；and表并列关系；so和for表因果关系。句子前后是并列关系，所以选B。
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