单项选择题

No one will be admitted to the briefing room during Ms. Palmer's speech, so it is important that you arrive prior ______ the scheduled start time of 3:30.

(A) to
(B) than
(C) from
(D) at
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单项选择题
Employees are encouraged to support the greening of the home office in ______ ways they feel most comfortable.
(A) whenever
(B) whichever
(C) however
(D) wherever
单项选择题
The anti-cholesterol drug Phisor has yet to be approved for use in ______ with pharmaceuticals that treat heart disease.
(A) partnership
(B) accordance
(C) teamwork
(D) conjunction
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