Open the brackets and use proper tenses and voices:

6. Technical journals (to read) by persons and companies who (to be) interested in this particular kind of product. 7. Technical journals usually (to print) once a month. We at AB airlines want to ensure that your (8) ____ (fly) is both comfortable and safe. As space on the plane is (9) ___ (relative) limited, we would appreciate it if you could put your (10) ___ (belong) in the overhead storage compartments.