英语,改成一般疑问句,肯定回答和否定回答

1.this is gina.
Is this gina?
yes,she is. no , she is not.
2.that is his brother.
Is that his brother?
yes, he is. no, he is not.
3.he is my good friend.
Is he my good freind?
yes, he is no, he is't .
4.these are nice pictures.
Are these nice pictures?
yes,these are .
no,these are not.
5.those are school things.
Are those school things?
yes, those are .
no , those are not.