第5题: [单项选择]One of the workers (has) (hung) the curtains that (had) been (laying) on the floor. A. has B. hung C. had D. laying 参考答案:D 答案解析:改为lying。lie表示“躺，位于”时，过去式是lay，现在分词是ly-ing。而lay为动词“放置，搁放”的原形，如lay the table。此处为前者，故用lying。
第14题: [单项选择]The firemen arrived half an hour ______ the alarm was first raised, when it was too late to save much of the building. A. since B. until C. as D. after 参考答案:D 答案解析:[精析] 本题考查连词的用法。since的意思是“自从…以来”，until的意思是“直到…才”，as的意思是“当…时候”，after的意思是“在…之后”。本句意为：消防员在警报第一次响起的半小时后到达
第27题: [单项选择]-- Somebody should go to get Dr Brown immediately. -- He's already been ______. A. asked for B. called for C. sent for D. looked for 参考答案:C 答案解析:[分析] 本题的测试点是固定词组的用法。send for意为“派人去请”，符合题意。asked for“要…”，called for“打电话找…”，looked for“寻找”，均不符合题意。
第28题: [单项选择]关节镜检查手术常见的并发症有（）。 A. 伤口疼痛，关节积血、积液 B. 关节感染 C. 关节内韧带、软骨、半月板损伤 D. 深静脉血栓形成 E. 腓总神经损伤 参考答案:A
