Exercise 2: Suppose the model essay had four body paragraphs instead of two. Choose the transition signal to the beginning of each extra paragraph to link it to the one before it. The Computer Revolution Topic sentence 1: The most important effect of personal computers is to expand our ability to communicate with the outside world. Topic sentence 2: Besides improving communication, personal computers have made it possible to do business from home. Topic sentence 3: × × × changing business practices, personal computers have changed the world of education. Elementary school children are learning to write, practice math, and create computer art. High school students no longer need to spend hours in the school library. Topic sentence 4 2. × × × the support of computerization of the classroom, not everyone agrees that computers are good for education. Replacing a teacher with a machine is not progress, according to some critics. Young children especially need a real teacher, not a machine, to guide their learning......