(2013·高考浙江卷)During the last three decades，the number of people participating in physical fitness programs sharply.
A. was increasing
B. has increased
C. had increased
D. will be increasing
网友回答
A. was increasing
(答案→)B. has increased
C. had increased
D. will be increasing
解析：选B。题干的意思是：“在过去的三十年里，参加健身计划的人数急剧增加。”由时间状语during the last three decades可知，本句要用现在完成时态，所以正确答案为B项。注意对现在完成时态的时间状语in/during/over the last/past ten years，so far，since...等的积累。