按要求写句子

1. These are his sisters.(改为一般疑问句,并作肯定回答)

_______ _______his sisters?

Yes,_______ _______.

2. Those are my friends.(改为否定句)

_______  ________ _________my friends.

3. Those are your photos. (改为单数句)

_______ _______your            ___.

4. This is my family photo. (改为同义句)

This is_______ ________ ________my family.

蛇串疮中医分几型，常用何方剂？主要的外治方法有哪些？