【题目】Half a century ago, parts of the Thames were “biologically dead” because of the pollution.
A. declared B. imagined C. sensed D. marked
在线课程【答案】A
【解析】
试题分析：A；考查动词辨析。A. declared声明，宣布 B. imagined想象，猜想C. sensed感觉，感觉到D. marked标出，标志；句意：半个世纪前，泰晤士河的部分因为污染而被宣布“生物死亡”。根据句意，故选A