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
Sometimes ______ matters may result in surprising large effects.
A．predictable
B．big
C．trivial
D．imaginable
单项选择题
The government provides employment and training services for workers and ______ for those who are temporarily out of work.
A．make
B．compensate
C．relieve
D．resettle
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