Раскройте скобки, поставив глагол в нужное время. 1. some years ago this product (be) an innovation. 2. we (apply) for a patent soon. 3. tv (invent) before a clock-television (appear). 4. a clock-television (appear) after tv (invent). 5. market research usually (do) carefully. 6. now we (modify) our small screen version. 7. a large scale producer (do) much testing before they (start) selling their new modification.

buster43    3   29.06.2019 19:20    0