【正文】 Methane is not as heavy as gasoline, and it is safer. It does not explode(爆炸 ) easily. Also, when methane burns, very little is left. The air stays clean. There are problems, however. Methane gas takes up a lot of space, Cars and airplanes would need bigger fuel tanks(大容器 ). But scientists think they can solve the space problem. They hope that safe, clean methane will be a fuel for our cars of tomorrow. 46. The word fuel is used for anything that . A. can be burned to make energy B. is put into a tank C. is expensive to bum 47. According to the story, methane is than gasoline. A. dirtier B. safer C. heavier 48. According to the passage, one of the problems with using methane for fuel is that the gas . A. takes up a lot of space B. is hard to find C. does not burn very easily 49. In the passage, methane is called an old fuel because it has been . A. used often before B. used in cars for many years C. stored for a long time 50. Suppose your car uses methane gas. Which one of the following statements is the best reason for getting a larger fuel tank? A. You would not have to refuel so often. B. The extra methane would help make the car heavier. C. You should burn less methane. B When you are learning English, you find it not clever to put an English sentence, word for word, into your own language. Take the sentence “How do you do?” as an example. If you look up each word in the dictionary, one at a time, what is your translation(翻譯 )？ It must be a wrong sentence in your own language. Languages do not just have different sounds, they are different in many ways. It’s important to master(掌握 ) therules for word order in the study of English, too. If the speakers put words in a wrong order, the listener can’t understand the speaker’s sentence easily. Sometimes when the order of words in an English sentence is changed, the meaning of the sentence changes, But sometimes the order is changed, the meaning of the sentence doesn’t change. Let’s see the difference between the two pairs of sentences. “She ony like apples.” “Only she likes apples.” “I have seen the film already.” “I have already seen the film.” When you are learning English, you must do your best to get the spirit(精神實質(zhì) ) of the language and use it as the English speaker does. 51. From the passage we know that when we are learning Enlgish. A. we shouldn’t put every word into our own language B. we should look up every word in the dictionary C. we need to put every word into our own language D. we must read word by word 52. The writer thinks it is in learning English. A. difficult to understand different sounds B. possible to remember the word order C. important to master the rules in different ways D. easy to master the rules for word order 53. We can learn from the passage that . A. the meaning of an English sentence always changes with the order of the words B. the order of words can never change the meaning of an English sentence C. sometimes different order of words has a different meaning D. if the order of words is different, the meaning of a sentence must be different 54. “She only likes apples.” means . A. is the same as “Only she likes apples.” B. is different from “Only she likes apples.” C. means “She likes fruit except apples.” D. means “She doesn’t like apples.” 55. Which is the best title for this passage? A. different Orders, Different Meanings. B. How to Speak English? C. How to Put Euglish into Our Own Language? D. How to Learn English? C Though chopsticks are used in many Asian countries, they have their beginning in China. Chinese history says that the Chinese had chopsticks as far as the Xia Dynasty(朝代 )(about 4, 00 years ago). In the Spring and Autumn Period(時期 ) copper and i