As part of an exchange program, we now have an exhibition touring your country that shows how information technology is transforming our lives – replacing manual labor with robots, forecasting weather for farmers, or mapping the genetic code of DNA for medical researchers. These microcomputers today aid the design of everything from houses to cars to spacecraft; they even design better and faster computers. What is the main opinion of this passage?

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)