EX1. Read the passage and fill in each blank with a suitable word from the box.
working                    doing                       sound                   scientific              adults
writers                      universities                angry                  computers               have

Today, computer companies sell many different programs for computers. First, there are programs for (1)_________ math problems. Second, there are programs for (2)_________ studies. Third, some programs are like fancy typewriters. They are often used by (3)_________ and business people. Other programs are made for courses in schools and (4)_________. And finally, there are programs for fun. They include word games and puzzles for children and (5)_________.
There are many wonderful new computer programs, but there are other reasons to like (6)_________. Some people like the way computers hum and sing when they are (7)_________. It is a happy sound, like the sounds of toys and childhood. Computers also (8)_________ lights and pretty pictures. And computers even seem to have personalities. That may (9)_________ strange, but computers seem to have feelings. Sometimes they seem happy, sometimes they seem (10)_________. It is easy to think they are like people.