1. One (you) can attach peripheral devices to the computer.2. One also calls computer instructions programs. (They also call computer instructions programs.)3. One usually performs this work manually. (People usually perform this work manually.)4. They use computers to monitor environmental problems.5. Today a computer affects the lives of most of us every day.6. A computer virus damaged this program.7. The scientists determined the ’crash behavior’ of the airplane. 8. Dell Corp designed this monitor.