题目内容：

用括号内所给动词的适当形式填空。（5分，每空1分。）

1.Yesterday afternoon I saw some boys ________ (play) football on the playground.

2.Mr. Li felt angry and left without______ (say) anything.

3.I cut my finger and I’m trying ______ (not get) it wet.

4.It’s important for children to learn how _______ (do) chores at home.

5.They _______ (have) a piano lesson at this time yesterday.