单项选择题

Alternative energies will never become economical unless governments ______ incentives to homeowners and corporations.

A. is providing
B. provide
C. provided
D. will provide
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单项选择题
The report form must be completed and ______ to the workshop supervisor within 24 hours of an accident.
A. substituted
B. subscribed
C. submitted
D. subjected
单项选择题
Local residents are launching a new ______ to promote greater involvement in community affairs.
A. initial
B. initiation
C. initiate
D. initiative
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