Fill in the blanks with the correct form of verb ´´ to be ´´1) mi sister?

Fill in the blanks with the correct form of verb ´´ to be ´´ 1) mi sister. Writing a letter 2) tim and tom . Sleeping 3) my hamster . Running 4) his brothers . Playing golf 5) our friends. Singing 6) her dogs . Barking 7) the mice. Eating cheese 8) those woman. 9) the woman. Looking at.