单项选择题

The country's production dropped while prices and unemployed ______.

A．skyrocketed
B．outer-spaced
C．overestimated
D．under-questioned
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单项选择题
Children will work hard if the lessons are ______.
A．expressing
B．inquiring
C．attracting
D．interesting
单项选择题
Some conductors ______ sound amplification at their concerts.
A．let
B．allow
C．proscribe
D．permit
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