Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: There are forty-seven different kinds of kangaroos . The smallest kangaroos are about a quarter of a meter long; the biggest are taller than a man. Kangaroos have very long strong back legs. These are used for jumping. They also have long strong tails used for resting on. Kangaroos' front legs are much shorter, and are almost like arms. Kangaroos' heads are quite small, but their ears are quite large. Mother kangaroos have a pocket at the front. They have one baby each year. When it is born, the baby kangaroo is straight into its mother's pocket. The baby kangaroos stay there for six months. The biggest kangaroos stand more than 2 meters tall, and their legs are so strong that they can jump more than 9 meters. They are very fast, and can travel at more than 50 kilometers an hour. They are very strong, but only eat fruit, leaves and grass. Options: A 37. B 74. C 47. D 40. Answer: C 47. Question:
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The answer is:
How many different kinds of kangaroos are there?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: We can see trees here and there. Trees are important in the world. They are useful to man in three important ways. First, they give man food, wood and clean air. Trees give man food and they give many animals food, too. If there are no trees, many animals can't live. And it's not easy for man to live. Second, trees can give us _ . On a hot summer day, children would like to relax under the shade of a tree after they play for a long time. Third, trees can help to stop bad weather. But in many places , people cut down a lot of trees. And then the weather gets bad. Options: A animals like trees very much B trees can bring different weather C trees are good for children D trees are important to man Answer: D trees are important to man Question:
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The answer is:
The passage mainly tells us _ .

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: American schools must obey the classroom rules. Here are some of them. If the teacher asks you a question, you should answer it at once. If you do not understand the question, you can put up your hand and ask the teacher to say it again. You must not be absent ( ) on a test day. If you are seriously ill, let the teacher know. If your teacher allows _ , you'd better take the test within one or two days after you return to class. It is rude ( ) to be late. If you are late, you should come into the classroom and go to your seat quickly. In the US it is not necessary to knock before you enter the classroom. In America, you should call your teacher by his or her last name, not "teacher". Also you should use Mr, Miss, Ms or Mrs before the last name, such as Mrs Smith or Mr Jones. In the US, it is impolite to eat, drink or chew gum ( ) during class. Don't do these until ( ) the break. Options: A think it over and answer it B answer it at once C ask the teacher to say it again D stand up and keep quiet Answer: B answer it at once Question:
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The answer is:
If the teacher ask you a question, you should _ .