41. Getting a plenty of rest is really important.

42. Which activity using more calories, walking or riding a bicycle?

43. You shouldn't play more computer games in your free time.

44. I have a tooth decay, so I have to see the dentist.

45. Dr. Minh is a diet expert.

$\text{41. Getting a plenty of rest is really important.}$

$\text{42. Which activity uses more calories, walking or riding a bicycle?}$

$\text{43. You shouldn't play more computer games in your free time.}$

$\text{44. I have a tooth decay so I have to see the dentist.}$

$\text{45. Dr. Minh is a diet expert.}$