【题目】Raising ______ retirement age in progressive steps is in line with China’s labor market realities, ______ official said on Tuesday.
A. / ; the B. the; the
C. the; an D. / ; an
在线课程【答案】C
【解析】试题分析：第一个空特指退休年龄，用the,第二个空某一个官员，泛指，official是元音音素开关，用an.句意：周二一位官方说，渐进式延迟退休年龄是符合中国劳动力市场现状的。