input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Have you ever heard your own voice? "Of course," you say. Has anyone else ever heard your voice? Again you say, "Of course."But that's not quite true. Nobody else has ever heard your voice--the way you hear it. When you talk, you set up sound waves . The air outside your head carries the sound waves to your outer ears. But, of course, the sound of your voice begins inside your head. The bones of your head pick up the sound waves, too. They carry the sound waves straight to your inner ears. You get the sound from the outside and the inside too. Other people get just the sound waves from the outside. That's why they don't hear your voice the way you do. Options: A waves in the air B the way you hear your own voice C voice gets around far and wide D the different ways you and others hear your voice Answer: D the different ways you and others hear your voice Question:???
output answer: The passage is mainly about _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: A farmer was put in prison . One day, he got a letter from his wife. "I am worried about our farm," she wrote. "It's time to plant potatoes, but I can't do all the digging by myself." The farmer thought over and then had an idea. He wrote to his wife, "Don't dig the fields. This is where my gold is. Don't plant potatoes until I come home." A few days later, the farmer got another letter from his wife. It said, "Two days ago, about ten prison guards came to our fields. It looked as if they were looking for something. They have dug our field." The farmer wrote to his wife at once. "Now you can plant our potatoes," he wrote. Options: A They wanted to help the farmer B Their leader ordered them to do so C The farmer asked them to do so D They wanted to find out the gold Answer: D They wanted to find out the gold Question:???
output answer: Why did the prison guards dig the farmer's fields? _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: People like to give gifts to others on _ days. Do you know how to choose gifts? You should choose gifts that your family or friends like. Different gifts are for different people. For example, boys often like to play with robots ,toy guns and balls. And girls may like something lovely, like flowers, dolls and beautiful clothes. Of course, you don't need to choose something expensive. Your feeling is much more important than money. There is a Chinese saying, " _ Options: A beautiful B interesting C important D funny Answer: C important Question:???
output answer: The word "big " in the first sentence means " _ ".

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Elena jogged with her dad in some empty lots . These out-of-the-way lots were good places to jog. But the lots were full of rocks and rubbish. One day, Elena saw a sign on the lots. It said, "New City Park". Elena was excited. Maybe the park would have a jogging trail ! Elena told her parents about the sign. "I read about the park in the newspaper," said Elena's father. "The city wants volunteers to help clean the area. Then the city will build a soccer field and a playground. But the paper didn't mention a jogging trail." "Well, perhaps if I help clean up the lots, they'll put in a jogging trail," said Elena. On Saturday Elena went to the lots. Many adults were working there. Some were picking up rubbish. Some were moving rocks. Elena looked around. She could carry rubbish, and she could move rocks. So she went to the area every week to do volunteer work. She told everyone she was glad to help build the park. She explained that she hoped the park would have a jogging trail. Then everyone knew her and her jogging trail. Soon the volunteers cleared the lots. The city could start building. The mayor gave a speech. He showed a drawing of the new park. He told them about the soccer field. There would be picnic tables. There would be a playground. The park would even have basketball courts. But there was no sign of a jogging trail. The mayor thanked the volunteers. Then he asked if they had any suggestions. The volunteers said they wanted to build a jogging trail around the park. They told the mayor how helpful Elena had been and how she wanted a jogging trail. The mayor then said, "A jogging trail won't be hard to build. Let's do it!" Everyone clapped and cheered. Options: A The volunteers. B Elena herself. C Elena's father. D Nobody. Answer: A The volunteers. Question:???
output answer:
Who suggested the mayor to build a jogging trail?