×
单选题
21.The competition from experienced staff members, some of whom are higher in rank, to mydisadvantage.
A
A. works
B
B. working
C
C. work
D
D. to work
答案解析
正确答案：A
解析：
21.【翻译】来自于有经验的职员的竞争，其中一些人职位更高，使我处于不利地位：【精析】A分析句子结构可知，两个逗号之间为非限制性定语从句，修饰前面的experienced staff members,主句中 缺少谓语动词，所以排除选项B、D。本句主语部分的中心词为competition竞争），是不可数名词，所以谓语动词应用 单数形式。故选A。
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