【题目】With people paying attention to fitness, self-service mini-gyms, each covering about 5 square meters, in China’s major cities these years.
A. have sprung upB. sprang up
C. had sprung upD. spring up
在线课程【答案】A
【解析】
考查时态。句意：近年来，随着人们对健身的重视，面积约5平方米的自助迷你健身房如雨后春笋般在中国各大城市兴起。根据these years“这些年”，可知句子用现在完成时态，故答案为A。