【正文】 when we learn a foreign language, we can find a native speaker who wishes to learn our languages. So we both get a chance to practice. This is the tandem exchange (交流).For example, I’m a native English speaker but I want to learn Spanish. So I go to a tandem meeting. There I can find a native Spanish speaker who wants to improve his or her English. Then we bee “tandem” partners. I speak English with my Spanish tandem partner for about an hour and help him or her with some English problems. After that, we speak Spanish for an hour, too. The idea of this language exchange is great because we can learn something about a language that we may not learn in class. This is the main reason why we can choose the tandem exchange as a way to learn a new language.In the tandem exchange, we can also read passages with our partner. This way we can not only practice our pronunciation but also understand the meaning of difficult words in other languages. We can then have conversations about the passages in order to practice our speaking and listening.So I advise you to participate in the tandem exchange. If there’s no foreigner around you, online tandem exchange is also a good choice. Join in the tandem exchange and enjoy the opportunity of learning new languages and understanding the cultures of other countries!( ) 51. Which of the following is a tandem bicycle? A. B. C. D. ( ) 52. Which language skill is NOT practiced in the tandem exchange according to the passage? A. Speaking B. Writing C. Reading D. Listening( ) 53. The underlined phrase “participate in” means “　　　　”. A. take in B. make up C. take part in D. give up（D）Saying no starts small“All right then — just one more piece...” Words every girl has said when they are faced with the delicious cheesecake. Of course, many of us know we may eat the whole thing in the end.It isn’t just girls. Most of us find it hard to say “no” to something attractive. However, scientists now say that willpower is very important to success and a happy life.Scientists in different countries have been studying the effects of willpower on people’s lives for a long time. The results are similar, according to an article on February 7 in the Guardian, a famous British newspaper.In one experiment, scientists told young children that they could either have a marshmallow (圓形軟糖) now, or two marshmallows in 15 minutes. Waiting obviously needed more willpower. Scientists then continued studying the children as they grew up. They wanted to see if some children always had stronger willpower. They also wanted to see how having stronger willpower affected their lives. Years later, scientists found that the children who had waited for two marshmallows were all healthier, happier and richer adults. Oppositely, the children who had shown weaker willpower at that young age were more likely to be in lowpaid jobs, to be overweight, to have social problems.But there is hope, Roy F Baumeister, an American social psychology(心理學(xué)) professor (教授) told the Guardian. Baumeister says we can train our willpower just like we train our muscles（肌肉）. Even a little practice can strengthen（加強(qiáng)） our overall selfcontrol if we do it regularly. You could start by making yourself stand up straight, speaking in plete sentences, or using a puter mouse with the other hand. Scientists have found that people who manage to change little habits often perform much better in laboratory willpower tests.Like muscles, willpower can “get tired”. Don’t try to do too many things at the same time, or when you don’t have enough energy, for example when you are ill. If you already feel tired, you can try to recharge(恢復(fù)) your willpower with a good night’s sleep and by eating well. ( ) 54. The example of a girl eating cheesecake is used to A. prove that girls have weak willpowerB. introduce the topic of willpower to the readers C. show that cheesecake is especially attractive to girlsD. show the connection between willpower and success ( ) 55. What can we infer from the experiment? A. The scientists had already known the results before the experiment. B. It showed that willpower is the most important to success and a happy life. C. The children who chose to wait were more likely to be successful in their lives. D. The children who chose only one marshmallow at first had stronger willpower. ( ) 56. Which of the following is NOT mentioned about the training of willpower?A. You should h