Помогите с английским пожалуйста)Put the verb in brackets into the correct

Помогите с английским пожалуйста)

Put the verb in brackets into the correct form active or passive.

1.The plates (to separate) by gaskets.

2.Leaking joints (to cause) contamination.

3.It (to allow) more thorough cleaning.

4.Tube failure (to cause) by marine deposits.

5.Fluids (to pass) through the narrow passages between the plates.

6.Damaged plates (to renew) easily.