按要求改写句子。
1. Ella has got an aunt. (改为一般疑问句，并作否定回答)
—______ Ella ______ an aunt?
—No, she _______.
2. There is a pencil on his desk. ( 改为同义句)
He ______ _______ a pencil on his desk.
3. Tom has got a sister. (改为否定句)
Tom ______ ______ a sister.
4. I have got four sisters. (对画线部分提问)
______ ______ sisters have you got?
5. —What're those?
—They're photos. (改为单数形式)
—______ that?
—______ a photo.
