问题
单项选择题
There has been a great increase in retail sales , （）﹖
A.does there
B.isn't there
C.hasn't there
D.isn't it
答案
参考答案：C
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There has been a great increase in retail sales , （）﹖
A.does there
B.isn't there
C.hasn't there
D.isn't it
参考答案：C