Подскажите пожалуйста.Нужно заполнить пропуски в предложениях, вставив it039;s или its.1) This

Подскажите пожалуйста.Необходимо заполнить пропуски в предложениях, вставив it's либо its.
1) This is a dog and that is .... a bone. .... big.
2) This is a town. .... name is Boston. .... a big town. .... in America.
3) This is a flag. .... colour is white, blue and red. .... the Russian flag.
4) This is a book. .... little. .... an old book. .... name is " Old Tom".
5) This is my pet. .... name is Reddie. .... a young red horse.