Most people have jobs. They go to1 nearly every day. Some people are lucky. Either they have very interesting jobs or they can make a lot of money. Most people are not so lucky. Either their jobs are not very interesting or they don't make a lot of money.

    The most interesting jobs are often the most2. It3a long time to learn how to do them. Doctors study for at least 6 years after finishing school. Airline pilots study for longer. They have to learn to4in small planes first, and then5move up to bigger and bigger planes. Most airline pilots are at least 30 years old.

    Some young people have interesting and well-paid jobs. Many successful6are young. Football and tennis stars are usually under 35 years old. Older people usually can't play these sports very well. They cannot move fast enough. Golf, however, is a good sport for7people.

    Most people work until they are 60 or 65 years old. Then they retire (退休) and have a lot of8time. Some people9retire. These people usually have very interesting jobs10 artists, musicians, and actors usually work until they die. Their work is their life.

根据解释，填写相应的词语。

①一句话也不说。      ____

②比喻经常发生、习以为常的事情。____

③举止文雅优美。      ____

④诚恳真挚。          ____

七年级（1）班的同学在读了马佩瑶的事迹后，开展了以“人生难免有挫折”为主题的班会，请你参与并完成下列任务：

已知F₁，F₂为双曲线C：$x^2-y^2=1$的左右焦点，点P在C上，$\angle F_{1}P{F}_2={60}^{°}$ ，则$\left|P{F}_1\right|·\left|P{F}_2\right|=$  （ ）