input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Qian Xuesen is one of the greatest scientists who devoted all their lives to China's science and technology. In 1911, he was born in Hangzhou, eastern China. Qian received a mechanical engineering degree in 1934 in Shanghai and went to the United States on a scholarship to study aeronautical engineering at MIT at the age of 23. As a student at MIT, and later as a scientist and teacher at the California Institute of Technology, Mr.Qian played a central role in early United States' efforts to develop jet aircraft and rocketry technology. Mr. Qian served on the United States government's Science Advisory Board during World War II. His teacher and colleague, the Caltech physicist Theodore von Karmon, praised him as "a brain whose work will change the world greatly". In the 1940s Qian wrote an article for a famous magazine on a winged space plane that led to develop NASA's new space shuttle. In 1955 he came back to his motherland from the US. Under his leadership, China produced its first missile called Long March, and in 1970, launched its first satellite. He was considered as the father of the country's first ballistic missiles, first satellite and the Silkworm anti-ship missile. In 2009, he died in Beijing. Options: A ballistic missiles B satellite C Silkworm anti-ship missile D All of above Answer: D All of above Question:???
output answer: Qian Xuesen helped to produce China's first _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: In a surprising result, the No. 69 Middle School girls' football team yesterday beat their school's boys' team. The boys' team often helped the girls with their training . They had never lost to the girls before, but this time the girls beat them 4 -- 3. After the game, Wu Nai, head of the boys' team, was very unhappy. "We all thought this would be an easy game," he said. "We never thought a team of girls could beat us. This is the saddest day of my life. " But Mr Hu, the boys' PE teacher, said he thought the girls should win. "The boys were too confident ," he said. "I told them before the match that they needed to play well. They all thought that girls' football was a joke. Now they know better. They didn't play carefully, and they lost." The match had started well for the boys. After 30 minutes, they were winning 2 - 0. Their best player, Lu Ming, scored in the thirtieth minute. Earlier, the mid-field player, Ma Zhengquan, had scored the first goal in only the second minute of the match. After the first half hour, the boys seemed to become too confident. At first, the girls had felt a bit nervous , but then they became more and more confident. Just before half time, Li Xiaolin made the score 2 - 1. In the second half, the boys were the first to score. It was from Lu Ming. After that the boys became lazy, but the girls kept on working hard. Hao Meiling scored in the 68th minute, to make the score 3 -- 2. Then Li Xiaolin scored twice in the last six minutes to make the last score 4-3. It was a surprising finish. The girls' PE teacher, Miss Wang, was very pleased with their work. "They were great!" She said. "I told them they could win. I told them that the most important thing was teamwork. The boys' team had some good players, but my girls were a better team!" Options: A Because the boys' team helped the girls with their training. B Because the boys had never lost to the girls before. C Because the boys' team won the first half. D Because the girls played together better and worked harder. Answer: D Because the girls played together better and worked harder. Question:???
output answer: Why could the girls' team beat the boys' in the football match?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Most children think it's exciting to have a pet dog.In fact,it's great fun to play with a pet dog.But a few days later,you may cry,"My dog won't stop barking!"or"My pet won't come when I call him!"So,do you really know how to care for dogs? Chihlren love dogs,and dogs love children,too.You can teach your dog to sit,lie down,and even play games with you,but you should not be _ to him.For example,don't drag him around by the leg or the head,and don't hit him.What's more,when he looks ill,you should take him to the vet . You can teach your dog to sit without touching him.Here's how to teach him.You can hold a snack above his head and ask him to sit.When your dog sits,tell him"Good boy!"If he walks away instead of sitting,let him smell the food,then move it a little higher and try again. Soon,your dog will know it's time to sit when he sees you give him his dinner or a snack.Then you can add the word"sit".Use it when you want to give him food or comb his hair.And you know,your pet dog learns quickly! Options: A Love Your Dog B Have a Pet Dog C How to Feed Dogs D How to Care for Dogs Answer: D How to Care for Dogs Question:???
output answer: Which is the best title for this article?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: More than a hundred years ago, an American produced a game. He called it indoor tennis. The Americans were not interested in it at first so he sent it to his London friends and it became very popular in Britain. The game was then played across the dining-room table or on the floor with the net hung between two chairs. In the early days ,the balls were made of cork or rubber. The bats were made of wood. A few years later a hollow ball like the one we use today was invented. The game then quickly spread all over the world. An Englishman once made a bat covered with rubber. He first played the game in England and called it "ping - pong". "Ping" was the sound of the bat when it hit the ball, and "pong" was the sound of the ball when it hit the table. Options: A hollow B covered with rubber C made of cork or rubber D made of wood Answer: C made of cork or rubber Question:???
output answer:
In the early days,the ball was _ .