单项选择题

People began to conserve energy ______ largely to the hike in raw material prices last year.

A. according
B. attempt
C. due
D. need
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单项选择题
The firm has seen considerable changes after he ______ to be the director of the business division.
A. elect
B. to elect
C. was elected
D. elected
单项选择题
Among other things, we want to help you ______ find information on the matters involved and notify you of product upgrades.
A. quicken
B. quick
C. quickly
D. quicker
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