单项选择题

A recent survey indicates that only one in three US citizens have ______ traveled abroad.

A．ever
B．however
C．still
D．nonetheless
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Our firm ______ employees an extra day of paid leave for every 8 hours of overtime they work.
A．donates
B．requires
C．grants
D．retrieves
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The wealthy Chinese businessman______ the highest bid for the commercial property on High Street.
A．put in
B．kept on
C．sent to
D．left out
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