плиз помогите с контрошой по инглишу

кто может два последних хотя бы, очень надо это на зачет

Test for chemists (П term)
I Translate the text
The research of materials for the contact with biological media is of great interest for modern science, special attention being paid to such properties as surface structure and composition, antimicrobial activity. Methods, used for complex modification of various materials with biologically active substances, are not always successful in providing their prolonged action. For example, polyvinyl alcohol (PVA) films, obtained by the suggested method, lose their fermentative activity completely in the course of 2 hours. The evaluation of antimicrobial activity has to be carried out biologically. A new method developed by the Japanese scientists is worth mentioning this article.

II Translate the sentences into Russian
1. The question involved is to be solved immediately.
2. The element losing one or two valence electrons, the ions formed are positive.
3. The loss of four electrons accounts for atom’s attaining stability
4. If the relative humidity were low, evaporation would occur rapidly.
5. In case combustion had been supported, the explosion would have occurred.
6. The reaction would go to completion, if you changed the temperature.

III Put the verb in brackets into the appropriate tense form
1. If they had studied the solid, it (to be easy) to describe the properties.
2. If we were to make accurate measurement, it (to be necessary) to use this device
3. Provided he isolates a new element, he (to be given) a Noble prize.

IV Translate the sentences using Gerund or Gerundial Constructions
1. Это привело к получению гомогенного раствора.
2. Им удалось применить стекловидные полупроводники в электронике
3. Он настаивал на том, чтобы мы пришли.