将下列句子改成一般疑问句并回答。 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.