UNIT 5. INVENTIONS AND LIFESTYLES » Стр.137 (1)

Put the verbs in brackets into the correct tense forms. 1. We are not able to gain this power until the current technology have been changed. 2. We will tell him when he returns home from work. 3. I will not pay you until I get the pay cheque. 4. I wouldn’t talk with him until he apologises to me. 5. When the phone rang, somebody picked it up. 6. Till the streets are full of cars, I will stay here.