题目

Long bus rides are like television shows. They have a beginning, a middle, and an end with commercials (商业广告) thrown in every three or four minutes. The commercials are unavoidable. They happen whether you want them or not. Every couple of minutes a billboard glides by outside the bus window. “Buy Super Clean Toothpaste.” “Drink Good Wet Root Beer.” “Fill up with Pacific Gas.” Only if you sleep, which is equal to turning the television set off, are you spared the unending cry of “You Need It! Buy It Now!” The beginning of the ride is comfortable and somewhat exciting, eWhen I got to school, Amy ______his homework. A．had invented B．had finished C．had developed D．had rushed