Помогите пожалуйста срочно! Make up sentences according to the model : Model : We began playing volleyball . After an hour it began raining . We had been playing volleyball for an hour when it began raining . 1. The scientist worked at the experiment . After a year the problem was solved . The scientist ... for a year ... when .... 2. We packed our things . After two hours it was time to go to the railway station . We ... when it .... 3. The young man worked at the laboratory . After two years he decided to enter the university . The young man ... when he ....