_ на создание товару определенной позиции среди аналогичных товаров, существующих в продаже, своеобразной ниши, которая нашла бы отражение

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Present simple 1)they work at the office.+ they don't work at the office.- do they work at the office? 2)my uncle often meets his wife at her office.+ my uncle doesn't often meet his wife at her office.- does my uncle often meet his wife at her office? 3)they usually buy interesting books in london.+ they don't usually buy interesting books in london.- do they usualy buy interesting books in london? present coontinuous 1)he is reading a book at home now.+ he isn't reading a book at home now.- is he reading a book at home now? 2)ann is sitting at the table.+ ann isn't sitting at the table.- is ann sitting at the table? 3)he is doing work for this lawer.+ he isn't doing work for this lawer.- is he doing work for this lawer? present perfect 1)he has already finished your homework.+ he hasn't finished your homework yet.- has he finished your homework yet? 2)they have already chacked a file.+ they haven' already checked a file yet._ have they checked a file yet? 3)i've finished my work already.+ i haven't finished my work yet.- have you finished yor work yet?