Britain announced tighter security measures this week, with plans full-body scanners at Heathrow airport within three weeks.
A. to use
B. to be using
C. being used
D. having used
网友回答
(答案→)A. to use
B. to be using
C. being used
D. having used
解析：考查非谓语动词。句意“英国本周公布了更加紧缩的安全措施，计划三周内在Heathrow机场完成全身扫描仪的安装使用。”根据时间提示可知，表示将来，不定式to do可以表示将来，排除C、D；plan to do sth.“计划做某事”。Plans的逻辑主语是人，故不用被动语态。故选A。