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
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单项选择题
I can rest ( ) that they will get the goods shipped by the end this month.
A. assuredly
B. assured
C. and assure
D. assuring
单项选择题
( ) your price is the only solution to the dilemm
a.A. Putting downB. Take downC. Let downD. Bringing down
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