如图中甲、乙、丙三条曲线分别表示食物中三种营养物质在消化道中的变化情况,甲表示哪种营养物质( )
A:蛋白质
B:淀粉
C:脂肪
D:维生素
—How is your grandma?
—She is fine. She used to____ TV at home after supper. But now she is used to____out for a walk.