Onedayi的精選

問題詳情：完形填空   通讀下面這篇短文掌握其大意。然後從短文後各題所給的四個選項中選擇最佳的一項。   Onedayin1stgrade,Iwassittinginclasstryingtodomymathshomework.   Allmyclassmateswerestandingar...