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.