write in the correct verb to be. 1.Donna.......my best friend . 2) Ron and Dave.....brother and sister. 3) My grandmother......90 year old . 4) You .....a good student . 5) My house .......very pretty . 6) I......not at home.7) Dan and i........in school right now. 8) My book ......300 pages long . 9) My friends .......funny. 10) The children .........at a summer camp .​