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
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
B。考查动词时态。根据句首的during the last three decades这个时间状语，可以判断出后面句子应该用 现在完成时态。
【句意】过去三十年来，参加体育锻炼的人数增长了。