2. Complete the sentences with the verb To Be. a) He_______________ my brother. b) They_______________ students. c) I _______________ a boy. d) Mary and I_______________ cousins. e) Susan_______________ a good friend. f) Giraffes_______________ very tall. g) Rex ---------------------- a lively dog. h) You and your family_______________ kind. i) We_______________ 10 years old. j) Mr. Green_______________ a doctor.