Read the following article and select the best answer. Article: You will spend hours at the gym training your body, but do you ever think about training your brain? Here are four ways to keep your brain mentally active and healthy. Play games Your brain is a muscle just like the ones in the rest of your body. If you don't use it, you will lose it. For example, doing a crossword puzzle once a day is a good way to give the brain the exercise it needs. This kind of puzzle is good at training different areas of the brain. But remember that when doing this puzzle, you should gradually increase the complexity ; otherwise, it will become repetitive and stop being mentally challenging. Talk aloud Although it might sound strange to you, talking aloud is a great way to _ your memory. A good exercise to try is counting to 99 in threes as fast as you can. Be a team leader If you find you can do your work very easily, you should find a new task. It is important that your job should be mentally challenging. Complex jobs are often more challenging and make the brain work a little harder. Learn a language A study found that, compared with those who could speak only one language, the people who could speak two languages had a slower rate of cognitive decrease. Learning a new language is very challenging and it makes sure that different areas of the brain have their lights on. Question: Which group of people have a slower rate of cognitive decrease? - Those who don't often do crossword puzzles. - Those who don't often count to 99 in threes. - Those who do their work very easily. - Those who can speak more than one language.
Those who can speak more than one language.

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Read the following article and select the best answer. Article: The Ministry of Education in Singapore is releasing a new book this month that summarizes the thinking behind the model method for teaching math.The approach has drawn interest from many comers of the world thanks to the country's top performance on international exams.Last night, education officials and researchers from the US and Singapore highlighted some key differences between the two systems. Singapore's method is highly visual and explores fewer topics, but in greater depth.While Singapore's text books have an average of 34 lessons with 15 pages of explanation for each, much bulkier texts in the US include an average of 157 lessons, with about four pages of explanation per lesson.There arc some more surprising differences. Professional development is intensive for all teachers in Singapore, but strangely about half of the elementary teachers do not have university degrees.That is certain to change, though, as education standards for entering teachers are increasing, said Madame Low, the director of curriculum, planning and development with Singapore's Ministry of Education." Starting salaries for math teachers match public sector accountants or engineers.Teachers are treated as professionals," added Madame Low. Mentoring programs for new teachers in Singapore last five years! Teacher evaluations there are extremely comprehensive, and teachers who succeed receive bonuses worth one to three months of salary.Grades one and two have smaller class sizes--only 30 students.Students are taught in English, not their native tongue.Many are bilingual or trilingual. People often ask, how applicable is a successful model in Singapore to the more diverse and much larger US? I'm also interested in the practical challenges.Given that books in the US are written with state standards and assessments in mind, matching them up with another country's approach might be tough. What do you think? How applicable is a successful model in Singapore to the US? Question: The book released by the Ministry of Education in Singapore is about _ . - teaching methods - mathematic philosophy - model math teachers - solutions to mathematic models
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teaching methods

Ques: Read the following article and select the best answer. Article: Some people learn a second language easily. Others have trouble learning a new language. How can you help yourself learn a new language, such as English? There are several ways to make learning English a little easier and more interesting. The first step is to feel positive about learning English. If you believe that you can learn, you will learn. Be patient. You do not have to understand everything all at once. It is natural to make mistakes when you learn something new. We can learn from our mistakes. In other words, do not worry about taking risks. The second step is to practice your English. For example, write a diary every day. You will get used to writing it in English, and you will feel comfortable expressing your ideas in English. Several weeks later, you will see that your writing is improving. In addition, you must speak English every day. You can practice with your classmates outside class. You will make mistakes, but gradually you will become comfortable communicating in English. The third step is to keep a record of your language learning. You can write this in your _ . After each class, think about what you did. Did you answer a question correctly? Did you understand something the teacher explained? Perhaps the lesson was difficult, but you tried to understand it. You must be positive about learning English and believe that you can do it. It is important to practice every day and make a record of your achievements. You will enjoy learning English, and you will feel more confident in yourself. Question: To feel positive about learning English means _ . - if you are patient, you will learn - if you keep a record, you can improve - if you believe you can learn, you will learn - if you make mistakes, you can learn from your mistakes
Ans: if you believe you can learn, you will learn

Read the following article and select the best answer. Article: It is an aerial performance far beyond the capabilities of even the most complex modern aircraft: landing upside down on a ceiling. But it is routine business for bats, and now scientists have learned precisely how they do it. Brown University scientists observed two species: Seba's short-tailed bat and the lesser dog-faced fruit bat. They tracked their motions using three high-speed video cameras taking images at 1,000 frames per second, and studied weight distribution in the bats' body and wings. They found that by flapping both wings while folding one of them just a bit toward their body, a bat can shift its centre of mass to perform a midair flip in order to land on a ceiling. "Flying animals all move skillfully constantly as they fly through a three-dimensional environment," Brown biology and engineering professor Sharon Swartz said. "Bats employ this specific technique every time they land, because for a bat, landing requires reorienting from head forward, back up, belly down, to head down, toes up." When approaching their touchdown spot, bats are not flying very quickly, making it difficult to gather the type of aerodynamic forces produced by pushing against the air that could help position them for an upside-down landing. But their heavy wings enable them instead to create inertial forces to adjust themselves in midair. Swartz said bats, as nocturnal animals, are generally not fully appreciated as skilled pilots. "People have many opportunities to observe birds and insects flying, but the bat world is hidden in the night. The more we observe flight behavior in bats, the more we are impressed," Swartz said. Question: What is the text mainly about? - How bats hunt at night. - How bats land upside down. - How bats travel around at night. - How scientists track bats' motions.
How bats land upside down.