51. A. still B. yet C. already D. ever
II. Read the following passage then choose the best option.
Computerization has changed high school education in many ways. In early 1980s
only 20% of high school teachers in the US used computers. However, since then high
schools in the US have computerized rapidly. In 1987, school acquired about 1.5 million
computers with 95% of the schools having at least one computer. At school, teachers can use
a computer to bring texts, sound and pictures into a classroom. With a computer, they can
readily attract and retain students’ attention. Computers can also speed up the teaching
process and make difficult- to- explain ideas straight forward. This means that teachers can
spend more time answering students’ questions and catering for other needs. Computer
software can shorten the learning process by illustrating real world applications of abstract
theories.
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