Please fill in the blanks with the correct form of the words. survey double edge assembly line halt profession source brand user friendly 1. The market loves our new smart phones because they find them quite __________. 2. How often do you change the ________ of your hair care products? 3 . If a fault occurs at any of the steps, the following processes may be affected or the line may have to be ______ . 4. The launch of new products is not an easy task for marketing _________. 5. The people _________ usually include the end users and sales personnel. 6. The next step is for the __________ agent to send the supplier an order. 7. Mass production uses _____________ techniques to make much of the process automated. 8. Therefore, mass production can be a __________ sword.