Read the following article and answer the question. Article: President Barack Obama rode a bicycle at the White House Science Fair on April 22. But it wasn't an ordinary bike. As he pedaled, the President stayed in place, while the energy from his pedaling powered a water filtration system. He was testing an invention created by a team of 14 students from Northeast High School, in Oakland Park, Florida. Payton Karr, 16, and Kiona Elliot, 18, attended the fair as representatives of the project."We were hoping President Obama would ride the bike, but we didn't actually expect him to," Payton told TFK. " It really meant a lot." Kiona agreed. "It was pretty awesome to see the invention, which was invented by a group of 14 high school students and one teacher, along with the help of community members, got the interest of the leader of our nation," she said. The project was an idea that came about after one of the Northeast students, Kalie Hoke, visited Haiti after the terrible 2010 earthquake and saw how difficult it was to find clean water. The students invented a portable , bicycle-powered emergency water filtration system, which can provide 20-30 people with drinking water in a 15-hour period. The teens hope their invention will one day be used by relief organizations like the Red Cross. " They can take it to places after natural disasters so that water can be clean for the people there," said Payton. Payton and Kiona were among the 100 students from more than 40 states invited to the third annual White House Science Fair, in Washington, D.C., which is also attended by leaders in science and education. President Obama started the event in 2010 to _ students interested in STEM (Science, Technology, Engineering, Maths)."Well, if you're a young person and you produce the best experiment or design, you ought to be recognized for that achievement," Obama said when he first announced the fair. President Obama praised the projects during a speech to attendees after the fair. "The science fair projects of today could become the products and businesses of tomorrow," he said.... Question: The representatives of the bicycle-powered water filtration system _ . Answer:
OPTIONS:
- were both community members
- graduated from a famous university
- finished the project with the help of their parents
- were surprised that their invention interested Obama
were surprised that their invention interested Obama

Read the following article and answer the question. Article: Even before World War II ended in 1945,many world leaders dreamed of a new organization that would keep international peace and safety,and encourage international cooperation .An organization was formed.The United Nations was to work to this ideal of mankind. When the UN was founded in 1945,it was made up of fifty members.Fifteen members sat on the Security Council .Five members--the United States,the Soviet Union,Great Britain,France and China--were given,not changing membership on the Council.The Council was given the power to settle fights among nations by persuasion,mediation or other means.A General Assembly ,which included every UN member,was also set up.The Assembly could consider,discuss,and pass resolutions . As the UN passed its fortieth birthday in 1985,it came under increasingly sharp attack by Americans.It declared that the UN is unfit as a peace keeper and cited 130 wars since 1945 as a proof . The UN's supporters say that the organization is the world's best hope for peace.The UN provides,supporters also point out,much needed economic and technical help to less developed nations. Question: What do you think of the UN's supporters' words? Answer:
OPTIONS:
- They are fair.
- They are unfair.
- They are for the UN's supporters.
- They sharply attack Americans.

Answer: They are fair.

Read the following article and answer the question. Article: Sometimes you'll hear people say that you can't love others until you love yourself. Sometimes you'll hear people say that you can't expect someone else to love you until you love yourself. Either way, you've got to love yourself first and this can be tricky. Sure we all know that we're the apple of our parent's eyes, and that our Grandmas think we're great talents and our Uncle Roberts think that we will go to the Olympics. But sometimes it's a lot harder to think such nice thoughts about ourselves. If you find that believing in yourself is a challenge. It is time you built a positive self-image and learn to love yourself. Self-image is your own mind's picture of yourself. This image includes the way you look, the way you act, the way you talk and the way you think. Interestingly, our self-images are often quite different from the images others hold about us. Unfortunately, most of these images are more negative than they should be. Thus changing the way you think about yourself is the key to changing your self-image and your whole world. The best way to defeat a passive self-image is to step back and decide to stress your successes. That is, make a list of you need to, but write down all of the great things you do every day. Don't allow doubts to occur in it. It very well might be that you are experiencing a negative self-image because you can't move past one flaw or weakness that you see about yourself. Well, roll up your sleeves and make a change of it as your primary task. If you think you're silly because you aren't good at math, find a tutor. If you think you're weak because you can't run a mile, get to the track and practice. If you think you're dull because you think it doesn't mean it's true. The best way to get rid of a negative self-image is to realize that your image is far from objective, and to actively convince yourself of your positive qualities. Changing the way you think and working on those you need to improve will go a long way towards promoting a positive self-image. When you can pat... Question: How should you change your self-image according to the passage? Answer:
OPTIONS:
- To keep a different image of others.
- To accept your weaknesses.
- To understand your own world.
- To change the way you think.
To change the way you think.