单项选择题

Companies are using computers to boost workers’（）.

A.production
B.produce
C.product
D.productivity

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单项选择题
Small businesses will not be reluctant to（）spending if the economy turns down.

A.hold up
B.hold off
C.hold with
D.hold on
单项选择题
Structural bottlenecks bureaucratic resistance and labor （）slow or even thwart reform.

A.issues
B.events
C.things
D.incidents
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