51．Now many children are getting fat because they do little e（1）
．Some of them spend too much time watching TV．O（2）
have to spend a lot of time studying．So they don't have e（3）
time to exercise．
A report says that many middle school students spend about 10 hours a day sitting down and more than 13 hours e（4）
week watching TV．And many students like eating sweet food．That also m（5）
them fatter．
Do you want to be healthy but don't know h（6）
？It is very important to exercise and eat the right food．You don't need to spend all day doing exercise to keep f（7）
．In fact，you can exercise anywhere at any t（8）
．Walking to school，c（9）
the house or climbing stairs（樓梯）every day can h（10）
．Remember there are easy ways to keep fit．Doing exercise can make you feel good．That also helps you do better at school．
