Выпишите предложения в которых инфинитив является обстоятельством и переведите их на язык. 1. we hope to get new data in a week or two. 2. to study the nature of light and colour newton carried out many experiments with a prism. 3. the famous russian scientist lebedev was the first to solve the problem of synthetic rubber. 4. to study this phenomenon requires much knowledge. 5. this method is accurate enough to give reliable results. 6. steel is the metal to be formed from iron with a definite amount of carbon. 7. to increase the productivity of the machine tool one should know the characteristics of the material which is being machined.