With teenagers    1    (grow) up, they start making their own decisions. However, during this period, many of them may develop bad habits. Some bad habits, if left unchecked, could result in more serious    2    (problem) when they become adults, such as tobacco and alcohol abuse. To prevent    3     (harm) habits like these from dominating a teenager’s life is essential.   

    4    (actual), in many ways, our lifestyle is the sum of choices we    5    (make) for many years. Though it is not easy to change the bad habits, there    6    (be) still some steps to take. According to modern psychology, we must first learn about the “habit cycle”. Firstly, there is a “cue”, an action, event, or situation    7    acts as a signal to do something. Secondly, there is a “routine”, the regular action you take in response    8    the cue. Thirdly, there is the “reward”, the good thing or feeling we get from the routine.

    9    (change) the bad habits, we must first examine our bad habit cycles and then try to adjust them. It will be effective to combine the information from our habit cycles with our own positive ideas. Aside from changing bad habits, we can also use    10    habit cycle to create good habits.   

However, there is no “magic pill” that will help you; you have to decide on some changes. You have the power to build a happy and healthy life full of good habits!

At a time when we are all experiencing an extraordinary level of stress, science offers a simple and effective way to improve our own emotional （情感的）health.

To help yourself,     1    （ start） by helping others.

As     2     matter of fact, our bodies and minds benefit in a variety of     3    （ way）when we help others. Some research has focused     4     the “ helper's high. " Studies show that volunteering, donating money, or even just thinking about donating money can release （释 放）feel-good brain chemicals.

    5     （feel） responsible for other people also can help us deal with whatever challenges life brings. Emily Greenfield, an associate     6    （ consult） of social work at Rutgers

University, studied a concept called “felt obligation （义务），”   which     7     （measure） by asking people questions such as how obligated they would feel to give money to a friend in need, even     8     it meant putting themselves in trouble.

As it turned out, the people who had higher levels of “felt obligation” - meaning they were the type of people to sacrifice for others - dealt     9    （ well） with their own life challenges than others.

She     10     （note） that caring for others helped us to regulate our own emotions and gain a sense of control.

Gather a couple of friends and take a leisurely walk through the streets—this is    1    many youngsters enjoy doing when they visit a new city. To them, citywalk means wandering around the city on foot. Participants can follow a distinctive urban route,    2     (explore) the city at their own pace. Compared with famous    3    (spot) and big crowds, they prefer to gain a more inclusive experience of the places they visit.