问题
选择题
(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
答案
答案：C
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。