Раскройте скобки. 1) my mother (cook) dinner since 10 a.m. 2) my granny (knit) a sweater for my sister sine september. 3) i (read) this book for a week already. 4) we (be) friends for many years. 5) they (build) the house sinse 1995. 6) my parents (work) in the garden for 4 hours.