问题
单项选择题
There has been a positive response to the export promotion, ______ ( )
A. hasn't it
B. hasn't there
C. doesn't it
D. has there
答案
参考答案：B
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There has been a positive response to the export promotion, ______ ( )
A. hasn't it
B. hasn't there
C. doesn't it
D. has there
参考答案：B