题目内容
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
B
解析:
略
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题目内容
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
B
略