问题：
【题文】 ----Your grandfather is always full of_______. Do you know the secret?
----Well, he takes exercise every morning and keeps healthy diets.
A．force
B．power
C．energy
D．strength
【题文】 ----Your grandfather is always full of_______. Do you know the secret?
----Well, he takes exercise every morning and keeps healthy diets.
----Well, he takes exercise every morning and keeps healthy diets.
| A．force | B．power |
| C．energy | D．strength |
参考答案：