Here are the correct answers for the blanks:

1. B. energy
2. C. ride
3. A. do
4. B. need
5. B. in
6. A. fit
7. A. from
8. C. on
9. B. activities
10. B. tired

The complete passage:

We need calories or **energy** to do the things every day. For example, when we walk to school or **ride** a bike to school we spend a number of **calories** and even when we sleep, we also use them. But how many calories should we **need** a day to stay in shape? It’s difficult **in** for us to calculate. If people want to keep **fit**, they should remember that everyone should have between 1,600 and 2,500 calories a day.

We get calories **from** the food we eat. If we get too much food and don’t take part **on** any activities, we can get fat quickly. So besides studying, we should do some **activities**, play sports or do the housework, such as cleaning the floor, cooking, etc. Otherwise, we don’t eat enough, we will be **tired** and weak.