1. 用方框中所给单词的适当形式填空

thousand  boat  leave  why  pig

1. （1） —Nancy, please clean the floor.

   —? I cleaned it yesterday.

3. （2） My father keeps twentyon the farm.
5. （3） The careless（粗心的） boy alwaysthings at home.
7. （4） If you want to go across the river, you have to take a.
9. （5） There are more than two students in our school.