I began learning German three years ago. I . . . . . . . . . . . . . . . . . . . for three years 2. My father works at the factory. He started working there twenty years ago. He . . . . . . . . . . . . . . . . . . . for twenty years. 3. We are having a birthday party now. The party began two hours ago. We . . . . . . . . . . . . . . . . . . for two hours. 4. Mr. Brown is travelling round. Africa. He started travelling a month ago. He . . . . . . . . . . . . . . . . . . . for a month. 5. Robert is waiting for Bessy at the bus-stop. He began waiting for her twenty minutes ago. Robert . . . . . . . . . . . . . . . . . . for twenty minutes. 6. Betty is looking for a job. She started looking for a job three weeks ago. Betty . . ; . . . . . . . . . . . . . . . . for three weeks.