已知F₁,F₂为椭圆$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1(a>b>0)$的焦点，M为椭圆上一点，MF₂垂直于x轴，且$\angle F_{1}M{F}_2=60°$，则椭圆的离心率为（　　）

阅读短文，从短文下面的方框中的六个句子中选择五个还原到短文中，使短文通顺完整、衔接自然。

What’s in a Name?

    Your name is very important. When you think of yourself, you probably think of your name first. ____

    Right now, the two most popular names for babies in the United States are “Jacob” for boys and “Emily” for girls. ____ And why are some name unpopular?

    Names can become popular because of famous actors, TV or book heroes, or top players. Popular names mean very positive(积极的) things. Unpopular names mean negative(消极的) things. ____ Here are some common opinions about names from a recent survey.

Boys' names                           Girls' name

George: average, boring                  Betty: old-fashioned, average

Jacob: creative, friendly                  Emily: independent, adventurous

Michael: good-looking, athletic            Jane: common, ordinary

Stanley: out of date, serious               Nicole: beautiful, intelligent

____ The biggest reason is tradition. They have no choice. Many people are named after a family member.

____ A name that is unpopular now might become popular in the future. That's good news for all the Georges and Bettys out there.

句子还原，阅读短文，根据短文内容，从所给选项中选出五个句子完成短文。

Body language is one of the most powerful means of communication.____ people around the world show all kinds of feelings, wishes and attitudes that they might never speak aloud.

The most universal facial expression is the smile. People usually smile to show happiness and make people feel comfortable.But sometimes it doesn’t always mean that we are truly happy, however, smile around the world can be false, hiding other feelings like anger, fear or worry.____ However, the general purpose of smiling is to show good feelings.

     From the time we are babies, we show unhappiness or anger by frowning.____ Making a fist and shaking it almost means that someone is angry and threatening another person.

     There are many ways around the world to show agreement ,but nodding the head up and down is used for agreement almost worldwide.____ 

How about showing that I am bored? Looking away from people will make me appear to be uninterested. However, if I turn toward and look at someone or something, people from almost every culture will think that I am interested. If I roll my eyes and turn my head away, I most likely do not believe what I'm hearing or don’t like it.

Be respectful to people is subjective, based on each culture. but in general it is probably not a good idea to give a hug to a boss or teacher.____with so many cultural differences between people .it is great to have some similarities in body language. We can often be wrong about each other. So it is an amazing thing that we understand each other as well as we do.

1. A.Most people also understand that shaking the head from side to side means disagreement or refusal.
2. B.There are unhappy smiles, such as when someone “loses face” and smiles to hide it.
3. C.It is often even more powerful than spoken language.
4. D.People around the world show how their feelings in quite different ways.
5. E.Standing at a little distance with open hands will show that I am willing to listen.
6. F.In most places around the world, frowning and turning one’s back to someone shows anger.