下列做法容易造成肥胖的是( )
A:经常参加体育锻炼
B:参加适当的体力劳动
C:多吃食物多睡觉
D:维持能量的摄取与消耗的平衡
I ____ short hair before, hut now I have____hair.
I have to________my diet rather than eat the same all the time so that I can keep fit.