用括号内所给动词的适当形式填空。（5分，每空1分。）

用括号内所给动词的适当形式填空。（5分，每空1分。）
小题1:Yesterday afternoon I saw some boys ________ (play) football on the playground.
小题2:Mr. Li felt angry and left without______ (say) anything.
小题3:I cut my finger and I’m trying ______ (not get) it wet.
小题4:It’s important for children to learn how _______ (do) chores at home.
小题5:They _______ (have) a piano lesson at this time yesterday.