单项选择题

A new high-security online system ______ city residents to renew their auto and boat registrations over the Internet.

(A) affirms
(B) contains
(C) enables
(D) rejects
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单项选择题
Students who complete the quiz on economic theory ______ referring to their notes will receive 10 extra points.
(A) despite
(B) whereas
(C) without
(D) because
单项选择题
The committee's ______ of the cause of the accident determined that no one was at fault.
(A) variety
(B) suspicion
(C) analysis
(D) formula
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