помогите пожалуйста Fill in the prepositions or adverbsTeenage marketing: word-of-mouth

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Fill in the prepositions or adverbs

Teenage marketing: word-of-mouth approval

The natural habitat (1) ___________Japanese teenagers is a small area (2) ____________central Tokyo between Shibuya and Harajuku stations which is full (3) ________ boutiques and music shops. (4)__________weekends, teenagers (5) _________the city and the surrounding provinces go there to spot the latest street fashions. The area is also a magnet (6)__________ anyone researching or selling (7)_________ the teenage market: fashion and cosmetics companies, record producers, editors (8)_________young fashion magazines, soft drink and snack promoters, and makers (9)___________games and gadgets.

One such company was Bandai, the toy company responsible (10) ________ Tamagotchi, the eggshaped, pocket- sized virtual pet which swept the world in the late 1990s. Tamagotchi's first appearance was (11) ______ a test marketing exercise (12)______ the streets (13)_________Shibuya.

The schoolgirls that saw it were so impressed that told all their friends, and the first Tamagotchi to hit the shops sold (14) ________immediately. Such is the power of word of mouth. Normally, word-of- mouth promotion is free, but impossible to arrange. In Japan it can be arranged__________ (15) ________ a price. There are agencies (16) _________hundreds (17) __________teenagers (18)________their books who receive new products and tell their friends (19)_______ them, others are paid to queue up (20)__________ a new product or opening of a new store, creating an "artificial buzz" (21)_______it. Mr. Morita set (22) ______the agency Teens Network Ship which is the best specialist (23)____________the teenage market, and often uses informal, word-of-mouth style marketing methods. It has a register of 2000 senior high pupils in the Tokyo area, and is now expanding nationally. Information spreads more rapidly (24) _______the 15 to 18 age group than (25) ______any other life stage. A teenager tells (26) __________average 50 of his or her friends (27) _________the "discovery", so that a group of 1,000 can spread the word (28) ________-50,000 or more.