With an improved economy，many travelers have been buying first or business class seats，leaving fewer for upgrades（升级）.Here are some strategies for getting a free upgrade.

1. Fly a lot.

This is the most common way to earn a free upgrade. Most airlines reserve some spaces for travelers who fly at least 5，000 miles per year. Five years ago，this meant half or more of domestic（国内的）first class travelers sat up front for free. But now，airlines are selling more high-price seats，so on popular routes it is not unusual for more than 20 travelers to compete for one or two upgrades. But on routes with fewer business class travelers，free upgrades remain more plentiful.

2. Use miles.

If you're not a frequent traveler but still have some miles to fly，you may be able to use them for an upgrade. Be careful，though，as many airlines now ask not just for miles but also a cash co-pay. One example: on flights to Europe，American Airlines charges 5，000 miles，plus $110，for a one-way upgrade from discounted economy class to business class. For most domestic upgrades，American Airlines wants 15，000 miles plus $ 75.

3. Get lucky.

Sometimes airlines overbook coach（经济舱），and a few travelers get no seats. Agents try to ensure the airline's most loyal travelers get the nod（被选中）. Agents usually have some flexibility to make sure the plane is full and takes off on time. So it's the easiest way for them to do it-they might upgrade someone else out of order.

4. Save a life.

Flight attendants don't usually upgrade passengers, even when empty seats remain. Doctors and nurses who answer an emergency call are sometimes an exception. If they comfort a passenger, flight attendants might allow them to sit in business or first class for the rest of the flight.

Planning is good as it decides in details how we do what we want to do it. However, a plan bears no fruit without being actual carried out. My experience in the English speech contest last month was a case in point. A month before the event, I spent hours work out a schedule with my goals and practical steps. After that, I set out read widely for an inspired topic , wrote a speech, and practised my pronunciation with good public speech skills. I finally stood out as a first prize winner. I know why I achieved my success. It came from good planning but better practice.

Nowadays, more and more senior three students have mental health problems and it's hard for them to get rid of them. Why?

   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.

   Good learners can inspire students or anybody to learn well. Here are some characteristics of good learners.

Good learners are curious. They wonder about all sorts of things，often about knowledge beyond their areas of expertise（专长）. 【小题1】 Finding out about something they didn't know satisfies them for the moment，but their curiosity is addictive.

Good learners don't give up easily. A few things may come easily to learners but most knowledge arrivesafter effort. Good learners are willing to put in time. They try to search out new information. They read，analyze，and evaluate（评估）the information they've found. 【小题2】

Good learners know that a lot of learning isn't fun. The journey to understanding generally isn't all that exciting. 【小题3】 Others need boring attention to detail，and still others need periods of intense mental focus. Your back hurts，your arms and legs get tired，and your coffee gets cold.

【小题4】 There's always more to know. Good learners are never satisfied with how much they know about anything. They are surrounded by questions — the ones they still can't answer, or the ones without very good answers. Those questions follow them like day follows night with the answers bringing daylight.

Good learners share what they' ve learned. Good learners are teachers committed to sharing with others what they' ve learned. 【小题5】 Good learners can also explain what they know in ways that make sense to others. They are connected to the knowledge passed on to them and committed to leaving what they' ve learned with others.