单项选择题

Albert Einstein. the greatest scientist in the 20th century, once ______ an offer of $1,000 a minute to speak on the radio.

A．turned down
B．turned up
C．turned out
D．turned in
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We can get your clients to your nearest location ______ they can buy your product.
A．which
B．when
C．that
D．where
单项选择题
______ the 1990's that the trade between the two countries reached its highest point.
A．During
B．It was in
C．That it was in
D．It was
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