Помогите пожалуйста(((((((((((((((((((( Complete the sentences using the proper form of...

Question

Помогите пожалуйста((((((((((((((((((((
Complete the sentences using the proper form of the verbs in the Subjunctive Mood. Translate the sentences.
1 If the investigating officer (not to find) this witness, it (to be) difficult to investigate the crime.
2 If they (to ban) the sale of alcohol, there (may be) less violence.
3 He (not to be arrested) if he (not to try) to leave the country.
4 It is natural that the process of investigation (to begin) with examining the scene of the crime.
5 It is essential that different investigation methods (to use) with regard of different crimes.
6 It is necessary that investigation bodies (not to use) any drugs.

Answer 1

1 If the investigating officer does not  find this witness, it will be difficult to investigate the crime. 
2 If they ban the sale of alcohol, there may will be less violence. 
3 He will not arrest if he does not try to leave the country. 
4 It is natural that the process of investigation begin with examining the scene of the crime. 
5 It is essential that different investigation methods use with regard of different crimes. 
6 It is necessary that investigation bodies does not use any drugs.