1. His task was to translate the article from Russian into English.

1. His task was to translate the article from Russian into English.
2. The object of the experiment is to measure the voltage in the circuit.
3. One way of obtaining hydrogen is to obtain the substance in its pure form.
4. The purpose of this book is to present experimental data of recent research.
5. We are to study the main laws of physics.
6. Glass which is used for lenses is to be almost colourless.
7. In this instrument the current which is to be measured flows between points A and B.
8. New methods are to be described in the next chapter.
9. The method which is to be used in this case is rather complicated.