READ THE PASSAGE AND FILL IN THE BLANK BY CHOOSING A, B, C OR DMOST PEOPLE AGREE THAT COMPUTERS ARE THE MOST IMPORTANT (1)………

2. Read the passage and fill in the blank by choosing A, B, C or DMost people agree that computers are the most important (1)……….of the 20th century. The first businesscomputers (2)……….introduced just about fifty years ago, and now they are being used in a wide variety offields, from banking to space travel. However, until just a few years ago, computers were very large, expensive machines(3)………by large existed, very few people had ever seen one an even fewer had used one. Then in the 1970s thesilicon chip was invented. Because this electronic device could (4)………a large amount of information in a verysmall space, computers could be much smaller and less expensive than the huge mainframe computers used bycorporation. Some computer manufacturers believed that people might lie to have computers in (5)………homes,offices, and schools, so the personal computers was born.