阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

Dear Edward,   

    How are you doing? I just visited Machu Picchu in Peru today. I've never seen such a great place before. This place is so amazing that I want to share my feelings with you.

When I first got to Machu Picchu, I felt like I was walking in the sky. Even the clouds were just under my feet. Do you know how high Machu Picchu is? I was surprised that it was at about 2,500m. How could people build a city on such a high mountain? It must have been very difficult to move stones there.

Before the Europeans arrived, the Incas (印加人) were the last and the most modern society in the Andes (安第斯山). The Incas were afraid that the Spanish would find them, so they built Machu Picchu on an Andes plain (平地) as a secret city in the 14th or 15th century. As a result, the Spanish never found Machu Picchu.

An American explorer discovered Machu Picchu in 1911. For a long time before that, nobody even knew Machu Picchu was there. After Machu Picchu was found, it was called "The Lost City of the Incas". It is still a mystery why and how Machu Picchu was left and forgotten by everyone.

I just had a wonderful day. Especially, I will never forget the "goodbye boy" who was a local boy dressed in traditional Inca clothes. When we went down the mountain by bus, the boy waved goodbye to us until we were out of sight (视线). He shouted some words at us too, and I guess, it meant, "Goodbye, come back again soon!" Why don't you visit Machu Picchu someday? I am sure you will love this place as much as I do.

                                                                                                                                                                      Yours truly,

                                                                                                                                                                          Lynn

    Valentine's Day（情人节） is on February 14th every year. On this day, people send valentines to their loved ones. Valentine's Day is a special time to tell how much you care about（在乎） a person.

    Many people send candy in hearted shaped（心形的） boxes to people they love. Flowers are also presents that people send on Valentine's Day. Valentine cards with words are often used（被使用） by many people.

    Can you guess who gets the greatest number of Valentine cards in the USA each year? Is It mother or father, sister or brother? Is it uncle or aunt? Is it the special friend? No, it isn't!

    Mothers get a lot of cards, but school teachers get the most each year. Do you know who sends the most? Children do. Children send five times（倍） as many on February 14th as adults do.

    “Thank you” is one of the first few phrases(短语） that our English teacher taught us when we began to learn English. Each time we receive help from others, we say “Thank you”. We may say it many times a day. It seems that “Thank you” is very popular among us Chinese students. But is it as popular in the UK?

    The answer is “no”. According to a recent survey （最近的报告）in the Daily Telegraph newspaper, “Thank you” is only the 20^th most popular way of expressing gratitude（感激） in the UK.

    The survey shows that British people like “Cheers” most to express their thanks. For example, when friends invite each other for a drink after a game, a smile and a “Cheers” may be the best way to say “thanks”.

    You may often hear the word spoken between two good friends. “Great”, “nice one” and “all right” are also popular informal（不正式的） ways of showing gratitude among friends in the UK.

    Of course, there are some formal ways to say “thanks” among British people. For example, when a stranger is especially helpful, they may say “brilliant” or “much appreciated” to express their gratitude.

    By the way, how do British people usually answer “thank you”? They like to say： “ You're welcome.”, “No problem” or “Sure”.

    Since you have many more ways to show your thanks, next time you want to say “thank you”, why not try one of these new British phrases?

    Body language is the quiet, secret and most powerful language of all! It is said that our body movements communicate about 50 per cent of what we really mean while words themselves only express 7 per cent. So, while your mouth is closed, your body is just saying...

    Arms. How you hold your arms shows how open and receptive you are to people you meet. If you keep your arms to the sides of your body or behind your back, this suggests you are not afraid of taking on whatever comes your way. Outgoing people generally use their arms with big movements, while quieter people keep them close to their bodies. If someone upsets you, just cross your arms to show you're unhappy!

    Head. When you want to appear confident, keep your head level. If you are the monitor in class, you can also take on this position when you want your words to be taken seriously. However, to be friendly in listening or speaking, you must move your head a little to one side.

    Legs. Your legs tend to move around a lot more than normal when you are nervous or telling lies. If you are at interviews, try to keep them still!

    Posture(姿势). A good posture makes you feel better about yourself. If you are feeling down, you normally don't sit straight, with your shoulders inwards. This makes breathing more difficult, which in turn can make you feel nervous or uncomfortable.

    Mouth. When you are thinking, you often purse your lips(噘起嘴唇). You might also use this position to hold back an angry comment you don't wish to show. However it will probably still be noticed, and people will know you're not pleased.