题目内容：

What can technology do to make your world better?Three young people are starting new businesses to answer that question.

Mateusz Mach

Eighteen-year-old Mateusz Mach was the youngest person in Poland to receive money from investors to expand his company.He started Five,a mobile messaging application,or app,for deaf people.The app lets deaf people create their own hand signs to communicate with friends.The app now has more than 10,000 deaf users.And Mach thinks there will be about 150,000 more deaf users in the U.S. next year.There are many different sign languages in various parts of the world.Mach will be working with the United Nations in New York.He says,"I love to create.And I think that the creation of things will be my passion to the end of my life."

William Zhou

William Zhou is the co-founder and leader of Chalk.com.The education software company helps teachers from the kindergarten level t0 12th grade,or the end of secondary school.Zhou was born in Beijing,China,grew up in the Canadian city of Vancouver and founded his first company when he was still in high school.Zhou sold the company when he was studying computer science at Canada's University of Waterloo.But he strongly wanted to make a change in education,From his dorm room,Zhou created Chalk.It is a group of programs that supports individual teaching and learning.Based in Canada,Chalk is now used in 20,000 schools by more than 100,000 users worldwide. Zhou says building startups is a difficult process because it could last years."It's only worth it if you find something you truly care about—something you're passionate about.Otherwise,you may just end up crashing."

George Mtemaharji

George Mtemahanji was born in the African country of Tanzania and moved with his family to Italy in 2002, where he attended the Technical Institute of Alfredo Ferrari in Maranello.There he learned about renewable energy and began thinking that solar energy would be easier to use in Africa than in Europe.After graduation,he returned to Tanzania in 2014 to start his own solar energy company—Sun Sweet Solar—in partnership with his friend Manuel Rolando.He explains that he could not understand why,in a place with bright sunshine,"more than 90 percent of people had no access to electricity.So when I returned to Italy I spoke with Manuel on the huge electricity demand in Tanzania and to the possibility to open a business there."Sun Sweet Solar found early success in rural areas of Tanzania.Since then,the company has been expanding.He hopes to create jobs and help build his country in the process.He understands the process will take time."But I think we are on the right path."

1.We can infer from paragraph 2 that       .

A. Mach believes helping deaf people is where his interest lies

B. Mach wants to attract more investment

C. Mach will try to make Five available to people from different countries

D. the number of deaf users of the app will surely increase

2.What is true about William Zhou?

A. William Zhou founded Chalk.com with his own efforts and passion.

B. Chalk.com is a group of programs that helps teaching and learning through to university level.

C. Zhou believes building a company is hard because you may just end up in failure.

D. William Zhou created Chalk.com.with the purpose of improving education.

3.According to paragraph 4,all the following statements are true except      .

A. George Mtemahanji's schooling in the institute helped form his idea of starting his business

B. George Mtemahanji co-founded Sun Sweet Solar together with his friend Manuel Rolando

C. after its early success in rural areas of Tanzania,Sun Sweet Solar has been going downward

D. George Mtemahanji's efforts will be long-lasting and beneficial to his people and country