用所给词的形写填空。    

1. A               ( medicine) team was sent there yesterday.    

2. No students are allowed in the classroom without                (permit).    

3. If Larry were                ( come) , what would we say to her?    

4. I wish I               ( be) 20 years younger.    

5. If you lived there for a while, you                ( change)you mind about that place.

简述中国饮食文化形成阶段烹饪原料的类别。