_______ is important to eat a balanced diet．

A．This             B．That             C．It

Stress is the feeling you get when you’re really worried about something. This is the kind of worry that troubles you for hours, or   1  days. It makes you feel blue, scared or angry. You may find it    2  to eat and sleep, or you might eat and sleep much more than usual.
Too much stress is bad for you. Stressing out can lead to serious   3  like heart illnesses. But a moderate (适度的) amount of stress keeps your body and   4  alert (警觉的) and can make your performance better, like when you are doing a presentation to your class or   5  to the finishing line.
But, if you are seriously stressed out, look at these quick and easy ways to   6 . Firstly, you can go for a run, play tennis or ride your bike for a while    7   exercise produces more beta-endorphin(B-内腓) that controls stress. Secondly, having a good   8  is very important. You should try to get at least eight hours of sleep every night. Thirdly, eating a healthy, balanced diet that   9  all the food groups will help. Also, you can talk to the people you trust . Keeping your feelings inside may make the situation 10 while talking to a person you trust may make you feel better. They may be able to give you advice and help you solve your problem.