随堂演练即时体验 巩固提升 ⅰ.单句语法填空(不多于3个单词) 1.charles babbage is generally considered ________ (invent) the first computer. 答案与解析 to have invented consider sb. to do sth.“认为某人做某事”,且题干中the first computer暗示invent的动作发生在consider之前,因此用不定式的完成式,表示不定式动作发生在谓语动作之前。 2.either you or one of your students ________ (be) to attend the