input question: Write a multi-choice question for the following article, with the given choices and answer: Article: In every little girl's toy box. there might be a Barbie Doll. Barbie is 50 years old this, year. It was designed in 1959 by an American businesswoman named Ruth Handler. She and her husband Elliott started the toy company Mattel. She named the new doll after their daughter Barbara. The first Barbie Doll appeared at the toy fair New York on March 9th, 1959. This date is used as Barbie's birthday. Mattel sold three hundred thousand Barbie Dolls in the first year at a price of three dollars. Today, a fifty-year-old Barbie in good condition might cost more than twenty-seven thousand dollars. Mattel says 90% of the girls in the United States aged from three to ten own at least one Barbie Doll. And girls aged three to six own an average of about twelve. When Mattel created Barbie Dolls half a century ago, they never thought this doll would become a legend. Now Barbie Dolls are famous all over the world. They are sold in one hundred and fifty countries, and every second three Barbie Dolls are sold around the world. Options: A Mattel. B Elliott. C Barbara. D Ruth Handler. Answer: D Ruth Handler. Question:???
output answer: Who designed the first Barbie Doll in 1959?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: It is a fine Sunday morning. There're many Young Pioneers in the park. They are having a good time . Some are playing games under a tree. Some are singing and dancing near the river. Some are running up the hill. Others are boating on the river. Where's Li Lei? He's sitting on a chair by the river. What is he doing? He's reading. Where are Lucy and Lily? They're on the meadow .What are they doing? They are running after a butterfly .They want to catch it. Options: A He's sitting on the river. B He's reading by the river. C He's drawing on the chair. D He's boating on the river. Answer: B He's reading by the river. Question:???
output answer: Where is Li Lei? _

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: A predator kills and eats other animals as prey .Sometimes it also becomes food for other predators. Polar bears are the largest of all the land predators. They can run across snow and swim in icy water for hours without rest. Their favorite food is seal. Not all big animals live on small animals. Hippos have heavy bodies and huge mouths. But they don't eat animals. They just eat grass. Some predators use speed to catch their prey. Cheetahs are the fastest animals on land. They can run up to 70km an hour. Other predators use their senses to find their food. Sharks can see, smell, hear, feel and taste. They can also sense electrical currents( )from other animals' bodies. Some fish try to hide themselves, but with this sixth sense, sharks can always find them. Sharks have smooth bodies. This helps them swim without using lots of energy. They need to save their energy because they never really sleep and never stop hunting. Flying is a useful skill for many predators in the sky. The butcher bird is the most interesting predator. It has a special way of eating its prey. First it kills its prey. Then it hangs it on a fence or in a tree, just like a butcher hangs meat in his shop. Finally, it eats its prey. Some people hunt and kill more animals than any other predator. They not only hunt for food. They also hunt for fun. They kill sharks for their fins, and tigers for skins. Those human hunters are the worst predators on Earth. Options: A the sharks. B the tigers. C the polar bears. D some people. Answer: D some people. Question:???
output answer: Among the sharks, the tigers, the polar bears and some people, which are the most dangerous predators on earth?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Every year on April 22, People all over the world celebrate Earth Day. It is a time to work to keep our earth clean. People plan projects to clean up the land, air and water. U.S. Senator Gaylord Nelson first thought of the idea for Earth Day in 1962 when he saw polluted rivers and cities with smoke. He needed to get support from Americans to clean up the earth. Finally, on April 22, 1970, 20 million Americans celebrated the first Earth Day! Now many countries around the world celebrate it, and you can, too. How can you celebrate Earth Day? Here are a few ideas: Join a clean-up project------Clean up your street or a favorite beach. Save energy------Turn off the lights when you leave a room, and use public transportation. Use less water. Reduce / Reuse/ Recycle ------ Practice the three Rs: First, reduce how much you use. Then reuse or recycle what you can. You can make a difference on Earth Day and every day! Options: A On April 22, 1970. B On April 22, 1962. C On April 22, 1971. D On April 22 every year. Answer: A On April 22, 1970. Question:???
output answer:
When was the first Earth Day?