1. Many teenagers feel as if no one them and the changes they are going . Day by day e

问题补充：

1. Many teenagers feel , as if no one them and the changes they are going . Day by day, everything seems different, yet the same.

2. Many boys become — they want to find their own limits and the limits of the world around them, but may not have the to make good choices in their .

3. The truth is, diet and of life are often a problem for teenagers. However, the good news is that you can better, look better and have more energy if you eat the food and exercise . lonely; understands; through

答案：

(答案→)lonely; understands; through

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