用所给单词的适当形式填空。 1. Tom______(swim) for two hours in the river.

用所给单词的适当形式填空。

1. Tom______(swim) for two hours in the river.

2. When______you______(buy) the new computer?

3. When I entered the classroom, I found some students______(watch) TV.

4. There are some children who______(play) football on the playground.

5. —How long______ you______ (do) that? —For about five years.