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.

1)was
2)apply
3)inveted,appered
4)appered,invented
5)do
6)will modify
7)did,starts