n 1. I had the impression that your brother was the director of the company. n 2. He was a regular visitor. n 3. A successful scientist must be a good observer. n 4. Telecommunication means so much in modern life that without it our life would be impossible. n 5. He is full in vigor, but fails in carefulness. 6. When the switch is off ,the circuit is open and electricity doesn’t go through .