反正做不出來，著急的說：“快要放學了，”" i clapped the table and said，我快要做完了，說：“我做出來了，老師好象看穿了我的心思， how to do this problem? it s so hard. i can t do it. " i think i can t do it anyway. i ll think about it after i go home！ the teacher arranged us to do several questions in th