Questions 1～3 are based on the following passage, listen and choose the best answer. Where are Vitamins found when needed

Only about 15 of those over 75 become senile.

判断题Only about 15 of those over 75 become senile.

There are a lot of improvement in the care of old peopl...

判断题There are a lot of improvement in the care of old people, however, the old people"s health is not better.