Ответ:

1 Yes, it is. 2 No, he isn't. 3 No, it isn't. 4 Yes, she is. 5 Yes, it is. 6 No, he isn't. 7 Yes, it is. 8 No, he isn't. 9 Yes, it is. 10 Yes, it is. 11 No, she isn't. 12 Yes, she is.