human
Question: It's important for us to be healthy. But how can we keep healthy?  First,you should eat fruit and vegetables  three or four times a week. Then eat some tofu every day because it's good for people, both the young and the old. Milk is also necessary ,especially for  women. So you should have milk twice a day. It can help  you to be strong. Next, doing more exercise is better. You can do morning exercises or evening exercises. After supper you should take a walk. You should have milk  .

Choices:
A) four times a day
B) five times a week
C) twice a day
D) twice a week
gpt
The correct answer is 2: twice a day.