阅读下面短文并回答问题，然后将答案写到相应的位置上（请注意问题后的字数要求）
[1] Do you ever wish you were as thin as a model or as strong as your favorite football player? Maybe you wish you were taller or just shaped a little differently. Those thoughts are a natural part of growing up. How can you feel better about your body?
[2] Firstly, learning what you can and can’t change about your body is part of growing up .It can be hard to accept. But when people accept the way they look, they often feel happier.
[3] Eating healthy foods can make people feel better about their about their bodies.
Why? Because eating ________will make you full of energy and keep your body working just the way it should.
[4]Watching TV and playing computer games can be fun, but it doesn’t do much for your body because your body stays still. Those are called sedentary(需要久坐的)activities because you sit while you do them.
[5] But when you move your body-by playing, dancing, taking part in sports, or even cleaning your room – you exercise your muscles(肌肉).When you exercise a muscle ,it gets stronger and stronger. And when you have strong muscles, you can do whatever you want to do.
[6] People feel better about their bodies when their bodies can do whatever they want them to do .So climb a hill, jump rope, ride a bike, swim in a pool ,run up the stairs, or even do the hula – and enjoy all your body can do!
What is the best title for this passage?(no more than 9 words)
Please fill in the blank with proper words to complete the sentence.(no more than 4 words)
Your muscles will become ______________________________after you exercise them.
Fill in the blank in Paragraph 3 with proper words.(no more than 3 words)
According to Paragraph 2, how can you keep happy?(no more than 7 words)
What does the word “they” (Line 1, Paragraph6) probably refer to ?(no more than 2 words)