Therearefewerteachingpositionsleft

发布时间：2020-07-12 01:04:21

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

B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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