Searching for airfares often seems like a game that passengers are bound to lose.

Prices change from day to day, even minute to minute. Looking through various websites for the best deal can be a big challenge. Even when you do book, there’s no guarantee that you are going to get the best price.

“You just don’t know when to pull the trigger. It’s not like buying anything else I can think of,” said George Hobica, founder of Airfarewatchdog. com.

Harriet Levy paid $ 179 for a recent round-trip flight on American Airlines between New York and Fort Lauderdale, Florida. Sitting just one row behind her, Shirley Harrison paid $ 215. A few rows back, Ellis and Dianne Traub paid $ 317 each. There were at least 12 fares on the flight, ranging from $ 169 to $ 360.

“There’s no reason for it,” Harrison said.

Fares can vary significantly in just a few hours. One Delta flight from New York to Los Angeles jumped from $ 755 to $ 1,143 from a Friday to Saturday in late April, and then fell to $ 718 on Sunday.

The flight was one of a dozen the Associated Press（美国联合通讯社）followed over three months for a vacation between July 16 and 22. The number one finding: avoid booking tickets on weekends. It’s the most expensive time to buy.

There’s no way to guarantee the best fare. But before booking, travelers should pay attention to this additional advice:

● Book on Tuesday, Wednesday and Thursday. That’s when airlines most often offer sales.

● Buy in advance, but not too early. The best time is four to six weeks before traveling. In general, prices for any given flight are the highest when tickets are booked eight to ten weeks and two to three weeks in advance.

● Make use of social media. Airlines are giving more benefits like exclusive（专有的）sales to travelers who interact（交流）with them on Twitter and Facebook. Those specials are often gone within hours.

● The so-called discount airlines — JetBlue, Air-Tran, Southwest and Frontier — adjust their fares less frequently than other airlines, so you can feel more confident that the price will stay the same. But their prices aren’t always the lowest. Researching multiple airlines’ fares is the only way to get a good deal.

   As we all know, books are very important to us. They can provide us with many useful things. 【小题1】 However, how can you become a good reader? Do you know what effective ways to read are? I suggest you should follow these tips.

【小题2】 Libraries are wonderful places to find a variety of books. What’s more, you can fix your attention on the book in this quiet, comfortable place because you won’t be disturbed. You can also relax yourself in this comfortable place.

Pick out reading materials that most interest you. Finding materials that interest you is the first important step in improving your reading. 【小题3】 If you have trouble understanding what the author’s trying to say, you may not enjoy the book. If you are interested in a book, you will enjoy reading it again and again.

Know what your purpose is. If you want to learn the language, you should learn the sentence structures, the useful words and expressions that you may need to use later. 【小题4】 The more words you are exposed to, the more your vocabulary will grow. This will help you write a good composition. 【小题5】

   Friends should always be honest with you, right? So when they lie, it can  be really hard to take. You want to trust your friends and that means knowing that they'll tell it to you straight no matter what it is. But a friend who lies isn't always trying to hurt you. Why does this happen?

Protect your feelings

One of the biggest reasons friends lie is simply to avoid hurting your feelings.

Some people don't understand the difference between being gently honest with a friend and being so straightforward（直接了当的）that they leave a verbal wound. They choose to avoid these two extremes in the form of a lie.

What you can do: Encourage your friends to be straight with you. No matter what their answer is, let them know you are grateful for it.

They feel embarrassed

Sometimes friends will lie about things in their life because they are too embarrassed to admit the truth. Maybe they are going through a rough time and they just don't want you to know about it.

What you can do: Avoid trying to badger（纠缠）your friend into telling you what's wrong. Instead, make it clear that you are there for them when and if they are ready to talk.

Avoid an argument with you

Perhaps your friend knows that if they tell you the truth, you'll get angry with them. Avoiding conflict is not always healthy for a friendship because it allows problems to grow over time. If you have a bad temper（脾气）, your friend might try and avoid getting into an argument with you and instead just tell you what you want to hear.

What you can do: Make sure that if a friend tells you something unpleasant, you don't overreact. Consider what's being said and why your friend is telling you this. If you do end up arguing, do it in a respectable way.

Exclude you

Lying isn't always a sign that friends are trying to protect you, however. Sometimes they lie because they want to exclude you from their plans.

What you can do：When you find out with certainty that your friend is lying to you, try and face it. Be forewarned, however, that if a friend lies to begin with, he or she may lie when asked a direct question about his or her dishonesty. Go with your guts on this. If you feel your friend is lying because he or she doesn't want to be around you, that's your wake-up call to move on.

   How To Be Green?

What does “green” mean? “Green” is more than just a color. 【小题1】    Why green? Plants are green, and without them the Earth wouldn't be such a lovely home for us human beings. What can we do? Here's a four-step guide to being green.

Reduce It!

【小题2】 For instance, a shorter shower means you use less water and less fuel since your house uses fuel to run the water heater that warms up the water.

Reuse It!

Sometimes people call our society a “throwaway society”. It means that we're a little too willing to throw away old stuff(东西) and buy new stuff. 【小题3】 . For instance, if your baby brother becomes older and loses interest in his plastic basketball hoop(篮圈), why not give it to another family who has a little kid?

Recycle It!

Recycling has never been easier. Many communities(社区) will pick it up right in front of your house and some towns even require it. Recycled goods go to a recycling center, where they can be turned into new cans, bottles, and paper.

Enjoy It!

It's true that rubbish and pollution are problems, but the Earth remains a huge and beautiful place that's ready for you to explore. 【小题4】  Go for a hike, visit local nature centers and gardens, and climb up mountains.

But before you travel around the world, take a look at your own backyard. Find a place where you could plant a tree or put in a little fruit or vegetable garden. 【小题5】