1. 用方框中所给单词的适当形式填空。

climb   stay   be   open   either

1. （1） Therea small river in front of the village many years ago.
3. （2） Look! The kids areup the trees.
5. （3） My brother wasn't free last weekend. I wasn't, .
7. （4） Did Mr Whitein China last month?
9. （5） The supermarket isn't closed. It's .