单项选择题

22（）

A．application
B．usage
C．use
D．service

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单项选择题
21（）

A．an end
B．a close
C．a result
D．an outcome
单项选择题
Today, ______ major new products without conducting elaborate market research.
A．corporations hardly introduce ever
B．corporations hardly ever introduce
C．hardly corporations introduce ever
D．hardly corporations ever introduce
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