单选题 To: Security guardsFrom: Michael Reni, Building Security HeadSubject: Security InspectionsThere have been several instances when staff members working overtime have forgotten to lock their offices, leaving the building vulnerable to burglary. 【K10】______this, management wants guards on the night shift to conduct their security checks immediately after all office workers have left the building.Conference rooms and offices on every floor【K11】______. Moreover, please make sure all fluorescent lights are switched off, except in the hallways and stairwells. Air conditioning units and other office equipment should also be turned off.This new【K12】______takes effect tonight. Feel free to contact me if you have questions.

【正确答案】 B

【答案解析】解析：根据空格后的代词this，所有选项都有可能正确，因此需要把握上下文与空格所在句的关系。前文提到加班的员工忘记锁办公室的门，使得大楼容易被盗，后文说希望保安能够进行安全检查，由这一层因果关系，可知选介词词组(B)On account of(由于)。(A)Apart from表示“除……外，还……”，(C)In addition to表示“除……之外”，(D)In spite of表示“尽管”。

【正确答案】 A

【答案解析】解析：根据上下文语义，此处意为“检查各层的会议室和办公室”，各个选项都可能正确，需要联系上下文进行选择。后文中提到要确保所有荧光灯和冷气设备都关闭，可知必须检查会议室和办公室，因此选包含助动词must的(A)must be inspected。

【正确答案】 A

【答案解析】解析：根据上下文语义，此处意为“这一新_______从今晚开始实施”，各个选项都可能正确，需要理解和把握全文进行选择。纵览全文，今后为了加强安保措施，将派部分执勤人员夜间在办公楼里进行日常巡逻，因此选(A)routine(日常工作)。(B)proposal表示“提案”，(C)recommendation表示“推荐”，(D)appointment表示“约定”。