Heated arguments and cold silences usually happen between parents and their children.     1     is common for teenagers to have difficult relationships with their parents. Teenagers’ physical and mental changes may result     2     such family tensions. You may feel anxious about your height, your weight, your changing voice or spots. You may also have difficulty     3     (balance) your developing mental needs. You often fall into a dilemma between a new desire for     4     (depend) and a continued need for your parents’ love and support. It can be difficult when your parents treat you like a child     5     expect you to act like     6     adult, which may lead to a breakdown in your relationship.

    7     sometimes it may seem impossible to get along as a family, you can take action to improve the situation. The key to keeping the peace is regular and honest communication. It is completely normal to suffer from the stress     8     is caused by parent-child tensions.     9     (fortunate), this stormy period will not last. Everything     10     (turn) out all right in the end, and the changes and challenges of your teenage years will prepare you for adulthood.

Many of us try to change bad habits quickly, and if we are not successful straight away, we often become pessimistic and give up. In fact, the most successful way to change is not     1     （sudden）, but over a period of time.     2     the Chinese philosopher Lao Zi wrote, “A journey of a thousand miles begin with a single step.” One step seems small, but it is essential. To reach     3     goal of change, a person must show some discipline and repeatedly take many small steps. After all, it is not easy to break bad habits.

Wang Tianchang,     1     native of Gosu Province, moved into the Gobi Desert 22 years ago with his family. They have been fighting the desert ever since,     2    (become) a symbol of China’s anti-desertification (防治荒漠化) campaign.

At first, they     3    (start) planting bushes and sapling. To fund their efforts, they sold most of their farm animals, with only 6 sheep     4    (leave) to support themselves. To make matters     5    (bad), because they weren’t familiar with the environment, the trees they planted in the first two years     6    (blow) away by strong winds. But in time, they learned that adaptable grasses were ideal for “holding down the sand”. A bush known as the sweet-vetch has an 80 percent survival rate even in severe desert     7    (condition),     8     has become a key part of the Wang’s efforts.

Eventually, his efforts have not gone unnoticed. The Chinese government not only appointed Tianchang and his sons     9     forest protectors in 2010, but also started funding their work. The family home is surrounded by a     10    (beauty) vegetable garden, proving that land can in fact be transformed from the desert.

Like all big cities, Paris has a traffic problem: lots of cars, traffic jams and pollution from exhaust fumes (废气). So since 2007, the city     1     (begin) a plan to improve the situation.

Under the Velib scheme (公共自行车计划), people can take a bicycle, use it as long as they want, and then leave it at the same or another bicycle station. The first half hour is free,     2     if you don’t return it after 30 minutes, you have to pay. The bicycles are as heavy as 25 kilograms, and they’re all grey and have     3     (basket).

Paris isn’t the first city     4     (operate)a scheme like this. Not everybody thinks it’s a great idea. One Parisian (巴黎人) said, “These bicycles are only suitable     5     short journeys. ”

A city spokesman said, “The bicycle scheme won’t solve all our traffic problems, but it might work in     6     (reduce) air pollution. Traffic, together with factory fumes,     7    (be) big problem. Global warming and dramatic climate changes are becoming more and more serious,     8     is partly because rain-forests are     9     (gradual) disappearing. And it’s also because there’s so much pollution. Unless we do something now, there will be more traffic jams and temperatures will continue to rise, so the problems in our environment will get even     10     (bad). ”

Today, we buy more clothing than we did 20 years ago. Waste     1     (cause) by fast fashion has become a serious problem. That's a lot of waste if you take into     2     (consider) the fact that a lot of water     3    (use) to produce one T-shirt. What can you do about that? Use the principle“less is more”.

Fast fashion clothing is designed to fall apart fast,     4     means that you'll need more soon. In the long run, it's     5     (cheap) to buy fewer clothes of higher quality. Besides, more and more stores have recycling programs,     6     (make) it easy to get rid of unwanted items responsibly.

Businesses can be environmental-friendly, too. For example, an online clothing store promises     7    (contribute) 5% of its income to     8     organization which protects elephants in Africa.     9     (actual), shopping in such similar businesses is certainly an     10     (amaze) way to be in harmony with nature. It creates a win-win situation where you can buy things you love, and at the same time, the environment has been improved because of your effort.