将下列句子改成一般疑问句并做回答：
1.It is a lovely dog. Is it a lovely dog? - Yes, it is./ No, it isn’t. ________________________________________ 2.She is a lovely girl. Is she a lovely girl ? - Yes, she is./ No, she isn’t. ________________________________________ 3.He is my father. Is he your father? - Yes, he is./ No, he isn’t. _________________________________________ 4.They are Lily’s cousins. Are they Lily’s cousins?- Yes, they are./ No, they aren’t. _________________________________________ 5.We are classmates. Are you classmates? - Yes, we are./ No, we aren’t. ______________________________________ 6.I am a doctor. Are you a doctor? - Yes, I am./ No, I’m not. ________________________________________ 7.You are students. Are you students? - Yes, we are./ No, we aren’t. ____________________________________