He is a very busy person and has so many engagements that only his secretary knows of his（ ）.
A、conversation
B、whereabouts
C、agitation
D、persistence
【正确答案】：B
【题目解析】：本题考查词义辨析。conversation：交谈，谈话；whereabouts：下落，行踪；agitation：忧虑，烦乱，骚动；persistence：坚持，锲而不舍。句意：他是个很忙的人，有那么多约会，只有他的秘书知道他的下落。故B选项符合题意。
