从下面方框中选择适当的选项填入文中,使短文通顺、完整。选项中有两项是多余选项。
| A. in B. has C. large D. do E. even F. like G. faster H. thousands of I. tired J. reasons K. three L. doing |
Since 1946, one of the most important inventions has been the computer. It 1 changed our lives greatly.
The first computer was built 2 1946. It was as 3 as a room and very difficult and slow to use. But since the invention of silicon "chip"(硅片), computers have become smaller, easier and 4 to operate. Some computers are as small as TV sets. Some can 5 be made smaller than a book. And computers are getting smaller and smaller all the time. Who knows what the computers of tomorrow will be 6 ?
There are several 7 why the computer is useful to us. First, a lot of information can be put into computers. Second, the computer works very quickly— 8 times faster than a man—and it will not be 9 . Third, modern computers can be built into other kinds of machines, like radios, cars and planes. So today people can spend less time 10 more work with a computer.