单项选择题

Most electronic devices of this kind, ( ) manufactured for export, are tightly packed.

A．that are
B．as are
C．which is
D．it is
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单项选择题
( ) your price is the only solution to the dilemma.
A．Putting down
B．Take down
C．Let down
D．Bringing down
单项选择题
Please see that your written confirmation ( ) by the end of this month.
A．reaches us
B．will reach us
C．reach us
D．reached us
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