单选题
To: Security guards
From: Michael Reni, Building Security Head
Subject: Security Inspections
There have been several instances when staff members working overtime have forgotten to lock their offices, leaving the building vulnerable to burglary. ______ 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 ______. 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 ______ takes effect tonight. Feel free to contact me if you have questions.
【正确答案】
B
【答案解析】[解析] 介词选择 把握上下文
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] 助动词 把握上下文
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。