单项选择题

To survive in the intense trade competition between countries, we must _____________the qualities and varieties of products we make to the world-market demand.

A．improve
B．enhance
C．guarantee
D．gear
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单项选择题
(On the whole) , ambitious students (are much likely) to succeed in their studies than (those) (with) little ambition.
A．On the whole
B．are much likely
C．those
D．With
单项选择题
Do you enjoy listening to records I find records are often ____________or better than an actual performance.
A． as good as
B．as good
C．good
D．good as
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