---Doing sports good for our health.
--- Yes, so I do morning every day.
A. is, exercise
B. is, exercises
C. are, exercise
D. are, exercises
网友回答
A. is, exercise
(答案→)B. is, exercises
C. are, exercise
D. are, exercises
解析:句意:做运动对我们的健康有益。——是的,因此我每天做早操。上文主语Doing sports表达抽象含义,不可数,故谓语动词用单数。Exercise作名词讲时,是可数名词。结合语境可知下文早操表达复数含义,故exercise用复数形式,选B。