If you had billions of dollars,would you give away almost all of it to charity ?Well that's what Mark Zuckerberg,CEO and founder of Facebook,just said he would do.Zuckerberg and his wife Priscilla Chan promised to give 99 percent of their money to society.Right now that is about $45 billion(289 billion yuan),and they plan to give away the money to things like science and education. Many billionaires  have done similar things,for example,Bill Gates.But giving back and helping others isn't just for big billionaires.People like Zuckerberg and Gates may have more to give,but people with less are doing it too.Especially around the holidays,people want to do their part and give back to people who are less lucky than them.Schools may have food collections where people bring some food and together they can give away some other things to places like homeless centers. People also host special events like concerts or runs to be creative while raising money.Common people give away whatever they can to US charities like the United Way and the American Red Cross. Then these charities are able to help the poor in different ways like education,health and improving their lives.These things come together to make a big difference. Which of the following about Mark Zuckerberg is true?
He is a billionaire who wouldn't like to help charities. He is the CEO and founder of Facebook. He promised to give away all of his money to charities. He cares about science and technology.