单项选择题

it is ______ that all drivers install air bags at the front row for the minimum safety.

(A) decisive
(B) active
(C) imperative
(D) regular
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单项选择题
One grand prize winner and two first place winners will be ______ from all eligible, correct entries.
(A) handled
(B) drawn
(C) offered
(D) given
单项选择题
The most effective means for shop owners to learn how to make theirs more attractive is through ______ from their regular customers.
(A) alert
(B) objection
(C) feedback
(D) observation
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