请根据句子意思,用所给单词的适当形式填空.

请根据句子意思,用所给单词的适当形式填空.
1.This is a ___________ (sand) field,so you can’t plant any rice in it.
2.There is something wrong with my head,I am not ____________ (I) today.
3.I have never ________________ (see) the film which is named “Hero”.