Поставить правильную форму глаголов. Пожалуйста помогите.

1. If you ..... (know) the rules of operating this machine tool, I will explain them to you.
2. If I .... (be) you, I would ask the engineer an advice concerning this electrical device.
3. If we .... (don`t study) English, we wouldn`t know it.
4. If the metal .... (be heated) until it is soft, it may be forged.
5. You would know that this metal can be melted, If you .... (know) its properties.
6. If you .... (apply) high temperature, the material will suffer from the deformation.
7. They wouldn`t make such a mistake, they ... (carry out) a set of experiments.
8. If you ... (leave) the room, shut down the computer.
9. If life ... (exist) on Venus, we would know this.
10. Unless computer techniques ... (be developed), space research would never make such great progress.