B. Computers are helpful in many ways. First, they are fast. They can work with information even (1) __________ than a person. Second, computers can work with a lot of information at the same time. Third, they can store information for a long time. They do not forget things that the common people do. Finally , computers are almost always correct. They are not perfect, but they usually do not make mistakes.
Recently, it is important (2) __________ about computers. There are a number of things to learn. Many companies have computers at work. In addition, most universities (3) __________ day and night courses in Computer Science. Another way to learn is from a book, or from a friend. After a few hours of practice, you can (4) __________ with computers.
1. A. quickly B. quiclier C. more quickly D. most quickly
2. A. know B. knew C. knowing D. to know
3. A. have B. has C. had D. having
4. A. do B. play C. get D. work
C. Electricity is the most common form of energy used today. In the modern world, (1)_________ is instantly available at the touch of a switch. Electricity has numerous uses. The most common use of electricity is to provide artificial lighting. In factories, electricity is used to (2)_________ the electric motor of machines. In offices, electricity is used to light up (3)_________ workplace. It is also used to operate air-conditioners, computers (4)_________ many other machines.
1. A. gas B. water C. electricity D. coal
2. A. driven B. drive C. driving D. drove
3. A. a B. any C. the D. many
4. A. but B. so C. because D. and
