MEMORANDUM To: All Hanson-Tech staff From: Gloria Montalvo Subject: Energy saving policy As part of its energy saving policy, H

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问题 MEMORANDUM
To: All Hanson-Tech staff
From: Gloria Montalvo
Subject: Energy saving policy
As part of its energy saving policy, Hanson-Tech is asking employees to turn off all lights when rooms are empty. Each room【K7】______by the last person to leave it. 【K8】______, the maintenance department requests that people leaving the office turn off all other electrical【K9】______except for those connected to the security system. Thank you for your cooperation on this matter.
【K7】

选项 A、should check
B、should checking
C、should be checked
D、should have checked

答案C

解析 check的主语是人,而主语是Eachroom,所以谓语部分的动词应该用被动形式。所以正确答案是(C)。
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