Set in the red desert of central Australia is the mining town of Coober Pedy. At first sight, the town looks similar to many other such communities, but Coober Pedy is different. Sixty per cent of its population of 4,000 people lives underground. There are today about 800 underground houses as well as shops, hotels and even churches in the town and the surrounding hills. Once a site has been chosen, special tunneling machines are (30) ________ in to ceate passage and rooms in the sandstone. Rock pillars are left to support the roof, and door and windows are cut into the front. Houses are of all shapes and (31) ________, the largest having twenty rooms, and some even have their own swimming poll.

          Living underground may sound strange but in fact it has a number of advantages. In summer, the temperature outside the houses it remains a steady 25C all year round. Many people say that living underground makes they fell very secure. There is no problem with noise from the neighbours and the houses are not affected. By the fierce dust storms that regularly sweep (33) ________ the area. And of course, if your family (34) ________ or lots of friends come to stay, you can always dig another room.

Điền ô số 31

          Animation traditionally in done by hand-drawing or painting successive frame of an object, each slightly different than the proceeding frame. In computer animation, although the computer may be the one to draw the different frames, in most cases the artist will draw the beginning and ending frames and the computer will produce the drawings between the first and the last drawing. This is generally referred to as computer-assisted animation, because the computer is more of a helper than an originator.

          In full computer animation, complex mathematical formulas are used to produce the final sequences of pictures. These formulas operate on extensive databases of numbers that defines the objects in the pictures as they exist in mathematical space. The database consists of endpoints, and color and intensity information. Highly trained professionals are needed to produce such effects because animation that obtains high degrees of realism involves computer techniques from three-dimensional transfofmation, shading, nad curvatures.

          High-tech computer animation for film involves very expensive computer systems along with special color terminals or frame buffers. The frame buffer is nothing more than a giant image memory for viewing a single frame. It temporarily holds the image for display on the screen.

A camera can be used to film directly from the computer’s display screen, but for the highest quality images possible, expensive film recorders are used. The computer computer the positions and colors for the figures in the picture, and sends this information to the recorder, which captures it in film. Sometimes, however, the images are stored on a large magnetic disk before being sent to the recorder. Once this process is completed, it is replaced for the next frame. When the entire sequence has been recorded on the film, the film must be developed before the animation can be viewed. If the entire sequence dose not seem right, the motions must be corrected, recomputer, redisplayed, and rerecorded. This approach can be very expensive and time – consuming. Often, computer-animation companies first do motion tests with simple computer-generated line drawings before selling their computers to the task of calculating the high-resolution, realistic-looking images.

According to the passage, how do computer-animation companies often test motion?

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Mrs. Wheaton is shopping in Trang Tien Plaza. She is talking to a salesgirl.

          Mrs. Wheaton: “Can I have a look at that pullover, please?”

          Salesgirl: “________”.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

If the bride’s father ________ the car for the wrong time, she ________ at the church by now.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

We intend to ________ with the old system as soon as we have developed a better one.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in the each of the following questions.

Income from dancing is unstable so Giang popper also works as a director, performance event organizer, coach and dance instructor at home.