Question

【题目】My friend, who ________ on the International Olympic Committee all the time, is retiring next month.

served

is serving

had served

has served

Answer 1

【答案】D

【解析】本题考查时态。句意为“我的朋友下个月将退休，他一直在国际奥委会任职”。根据时间状语all the time（一直）和“下个月退休”可知现在仍在职，所以应用现在完成时态。