单选题 Dear employees,
Due to recent virus problems, the maintenance department uploaded anti-virus software program to our company intranet. If you think your computer has been infected, the only safe course of action is to install the new anti-virus program. In addition, the maintenance staff ______ regular maintenance of all computers beginning 11 a.m. on Wednesday.
The computers will be unavailable for one to three hours depending on their condition. ______ the inspection and maintenance are completed, employees will be informed of the availability of the computers.
Please contact the maintenance department with any questions and concerns about this matter. We apologize for any ______ this may cause.
【正确答案】 A
【答案解析】[解析] 语法：时态
1．这是一道时态题，选项均为时态。
2．第二段第一句话提到，根据电脑的状况会有一个小时到三个小时不同程度的瘫痪，此处使用了将来时，因而提到的检查是以后的事，也应使用将来时，A．will be performing为正确选项。
【正确答案】 D
【答案解析】[解析] 语法：连词
1．空格后接句子，副词moreover和in fact没有连接功能，因此A选项和C选项排除。
2．原文意思是“检查一结束马上会通知您”，是一个由连词as soon as引导的从句，因此D为正确选项。
【正确答案】 B
【答案解析】[解析] 词汇：名词
1．这是一道词汇题，选项均为名词。
2．与apologize(道歉)在内容上相搭配的是inconvenience(不方便)，因此B为正确选项。