Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
Most people agree that computers are the most important (1) _______ of the 20th century. The first business computers (2) ________ introduced just about fifty years ago, and now they are being used in a wide variety of fields, from banking to space travel. However, until just a few years ago, computers were very large, expensive machines owned by large corporations and governments. Although everyone knew that computers existed, very few people had ever seen one and even (3) ______ had used one. Then in the 1970s the silicon chip was invented. (4) ________this electronic device could store a large amount of information in a very small space, computers could be much smaller and less expensive than the huge mainframe computers used by corporations. Some computer manufacturers believed that people might lie to have computers in (5) _________ homes, offices, and schools, so the personal computers was born.
The first business computers (2) ________ introduced just about fifty years ago, and now they are being used in a wide variety of fields, from banking to space travel.
Trả lời bởi giáo viên
Dấu hiệu: fifty years ago -> sử dụng thì Quá khứ đơn diễn tả hành động đã xảy ra và chấm dứt trong quá khứ
Cấu trúc câu bị động: S + was/ were + Vp2
=> The first business computers (2) were introduced just about fifty years ago, and now they are being used in a wide variety of fields, from banking to space travel.
Tạm dịch: Máy tính doanh nghiệp đầu tiên được giới thiệu cách đây chỉ khoảng 50 năm, và hiện nay chúng đang được sử dụng trong nhiều lĩnh vực khác nhau, từ ngân hàng đến du hành vũ trụ.
Hướng dẫn giải:
Thì Quá khứ đơn