单项选择题

The goal is to use crops, weeds and even animals waste ______ the petroleum that fuels much of American manufacturing.

A. in terms of
B. in favor of
C. in spite of
D. in place of
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单项选择题
The designer has applied for a ______ for his new invention.
A. tariff
B. discount
C. version
D. patent
单项选择题
The person who ______ this type of research deserves our praise.
A. originated
B. manufactured
C. generated
D. estimated
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