A report on a new software that enables eyes to do the typing appears in Wednesday’s edition of the journal Nature. Replacing a keyboard or mouse, eye-scanning-cameras mounted on computers have become necessary tools for people without limbs or those affected with paralysis. The camera tracks the movement of the eye, allowing users to “type” on a virtual keyboard as they look at the screen. And now, researchers from the Cavendish Laboratory at Cambridge University say they have developed software that replaces the standard QWERTY keyboard layout with one that is nearly twice as efficient, more accurate and easier on the eyes. Called Dasher, the prototype program looks into the natural gaze of the eye and makes predictable words and phrases simpler to write. Any off-the-shelf camera capable of scanning eye movement can be used with Dasher, though the person must sit fairly still during the interaction.

  The letters of the alphabet appear in a single column on the right of the screen, with an underline symbol to represent a space. Each letter is framed by a colored box. As the user looks at a particular letter on the right side of the screen and drags it to the left with their eye, another sub-alphabet column begins to emerge inside the box on the right-hand side, along with more letters framed in colored boxes. Dasher is designed to anticipate which letter will be needed, so although the successive sub-alphabet columns are initially very small, the letters or combination of letters that appear are most likely to be used next in that sequence. For example, if a person starts with the letter “h”, the language models in Dasher will bring up “a” “e” “i” “o” and “u” in the sub-alphabet box, along with a few other possible combinations like “ello” to form the word “hello”. Each box has a complete alphabet within it, though the first letters to appear have the highest probability of usage. The letters are then placed together to form a sentence on the left side of the screen.

  Researchers say people will be able to write up to 25 words per minute with Dasher compared to on-screen keyboards, which they say average about 15 words per minute. With a bit of practice, MacKay said, Dasher offers an easier and more satisfying way for disabled people to communicate, providing them with better tools to write e-mail or create word processor files. Mackay said Dasher could work in most languages.

72. With the new software Dasher, people can type with their eyes through_____.

A. a computer screen with eye-scanning sensors

　　B. an eye-scanning camera on computer

　　C. a colored box attached to the computer

　　D. a regular keyboard with sensors

73. The new method of typing will most benefit those people who___________ .

A. have reading difficulties     B are visually incompetent

　　C. are physically challenged.   D. do not have a big vocabulary

74. The software Dasher_______________ .

　　A. is able to predict the next sequence of words the user is going to write

　　B. can form coherent sentences based on the first word typed in by the user

    C. has to be used with eye-scanning cameras specially designed for the 

software

　　D. does not allow the user to move a lot during the interaction

75. Which of the following is true about Dasher?

　　A. It can be used to write ten more words than on screen keyboard per minute.

　　B. It is easier to use than ordinary keyboards.

　　C. It can provide hints for possible sentences to be written.

　　D. It is an independent text processor.

完形填空：

阅读下面短文，掌握其大意，然后从1～25各题所给的四个选项中，选出一个最佳答案．

　Children always enjoy the small gifts of money. Father, of course, 　1　 a regular supply of pocket-money, 　2 　uncle and aunts are always a source of extra 　3 　. with some children, small sums 　4 　a long way. If six pences are not exchanged for 　5 　, they beat for months inside money-box. Only very 　6 　children manage to 　7 　up a money-box. For most of them, six-pence is a small price to pay for a 　8 　bar of chocolate.

　My nephew, George, has a money-box, but it is often 　9　 . Very few of the six-pence I have given him have 　10 　their way there. I gave him six pences yesterday and 　11 　him to save it, but he bought himself six-pence worth of 　12 　. On his way to the sweet shop, he 　13 　his six-pence and it 　14 　along the pavement and then 　15 　down a drain (排水沟). George 　16 　his jacket and pushed his right arm 　17 　the drain cover. He couldn't find his six-pence 　18 　and what's more, he couldn't get his arm out. A crowd of people 　19 　round him and a lady rubbed his arm with soap, but George was 　20 　stuck. The firemen were 　21 　and two of them 　22 　George using a special type of oil. George was 　23 　by his six-pence because the lady who owns the sweet shop heard about this and 　24 　him with a large box of 　25 　.