(2013·皖南八校第一次联考)A recent survey shows the number of people who shop in stores ， while far more are shopping online.
A. decrease
B. decreases
C. is decreasing
D. are decreasing
网友回答
A. decrease
B. decreases
(答案→)C. is decreasing
D. are decreasing
解析：选C 考查时态和主谓一致。the number of后接名词作主语时，谓语动词用单数；由后一分句中的“are shopping online”可知，前一分句也用现在进行时。