Life can be a lonely thing without friends. Acquaintances（熟人）are easy to come by but true friends are a whole other story. 【小题1】 Learn these four steps if you'd like to be a true friend that can be relied on.

●Be present for their highs and lows.

If you're absent during my struggle，don't expect to be present during my success.

—Will Smith

It's easy to be there for our friends when they ask us out for fun things. 【小题2】 You might not feel comfortable while spending time with an emotionally weak person on the verge of tears，but true friends are always there when they're needed the most.

●【小题3】

When people talk，listen completely. Most people never listen.

—Ernest Hemingway

Give your friends the gift of silence so they can drop their baggage and get on with living.

●Accept them as they are.

Happiness can exist only in acceptance.  

—George Orwell

If you can't accept people as they are，you will never know the feeling of true friendship. 【小题4】

●Forgive the past.

Holding onto anger is like drinking poison and expecting the other person to die.     

—Buddha

【小题5】 If so，you should understand that even the best of us suffer from the occasional slip of the tongue. Holding onto anger over a small mistake will make you look petty（小气的），so let it go.

How to Say Short-Term Goodbyes

Knowing when and how to say goodbye is often difficult, even in informal situations. But learning to say goodbye appropriately is a skill that will help you maintain（维持）your relationships. 【小题1】 Read on to learn how to recognize chances when you leave.

Recognize when to leave. When you’re at any kind of party or gathering, or even in a one-on-one conversation, it can be difficult to get away. Learning to recognize good chances to leave will make a short-term goodbye much easier. Notice if the crowd seems to be decreasing. 【小题2】

【小题3】 Overstaying your welcome is rude, but it can often be difficult to distinguish. People don’t like telling you that they’d like you to leave, so try to watch for signals. If the host of a party starts cleaning up, or withdraws from the conversation, gather your friends or belongings and make your exit.

Make plans to see each other again. Even saying “See you at school tomorrow” keeps the goodbye light and focused forward. If you haven’t already made plans, use it as a chance to make them. 【小题4】 Set up a coffee date or meeting for lunch later in the week if it makes the goodbye easier, but don’t promise anything you don’t want to do.

Tell the truth. It can be tempting to come up with a “good excuse” when you’re ready to leave. You don’t need to. 【小题5】 It doesn’t need to be any more complicated than that.

How teens can stay fit

Any type of regular physical activity can improve your fitness and your health.【小题1】

Exercise should be a regular part of your day, like brushing your teeth, eating and sleeping. It can be in a gym class, joining a sports team, or working out on your own. Keep the following tips in mind:

【小题2】A good attitude is important. Find an activity that you think is fun. You are more likely to stick with it if you choose something you like. A lot of people find it's more fun to exercise with someone else,so seek a friend or family member to be active with you.

Take it one step at a time.【小题3】For example, walk or ride your bike to school. Get on or off the bus several blocks away and walk the rest of the way. Use the stairs instead of taking the elevator.

Get your heart pumping. Whatever you choose ,make sure it includes aerobic （有氧的) activities that make you breathe harder and increase your heart rate. This is the best type of exercise because it increases your fitness level and makes your heart work better.【小题4】Examples of aerobic activities are basketball, running, or swimming.

Don't forget to warm up. Do  some  easy exercise or stretch （伸展) before you do any physical activity.【小题5】It is also important to stretch out after you exercise to cool down your muscles.

   A strong memory depends on the health and vitality（生命力）of your brain. They say that you can't teach an old dog new tricks，but when it comes to the brain，scientists have discovered that this old saying simply isn't true. 【小题1】

Give your brain a workout. Memory, like muscular strength, requires you to“use it or lose it”. The more you work out your brain, the better you' ll be able to process and remember information. 【小题2】

Don't skip the physical exercise. While mental exercise is important to brain health, that doesn't mean you never need to break a sweat. Physical exercise helps your brain stay sharp. It increases oxygen to your brain and reduces the risk of disorders that lead to memory loss.

Get enough sleep. There is a big difference between the amount of sleep you can get now and the amount you need to function at your best. 【小题3】

Keep stress in check. Stress is one of the brain's worst enemies. Over time, stress destroys brain cells. Studies have also linked stress to memory loss.

Have a laugh. 【小题4】 That holds true for the brain and the memory, as well as the body. Unlike emotional responses, which are limited to specific areas of the brain, laughter involves multiple regions across the whole brain.

【小题5】 Just as the body needs fuel, so does the brain. You probably already know that a diet based on fruits, vegetables, whole grains,“healthy”fats and lean protein will provide lots of health benefits, but such a diet can also improve memory. For brain health, though, it's not just what you eat — it's also what you don't eat.