单选题Though dentists recommend brushing one’s teeth three times a day, many adult Americans brush just twice a day and floss hardly never.A brush iust twice a day and floss hardly neverB brush your teethtwice and never flossC brush just twice but rarely flo
题目
单选题
Though dentists recommend brushing one’s teeth three times a day, many adult Americans brush just twice a day and floss hardly never.
A
brush iust twice a day and floss hardly never
B
brush your teethtwice and never floss
C
brush just twice but rarely floss at all
D
brush twice daily but hardly ever floss
E
only brush twice daily and rarely floss at all