第一阶段──填空。这一阶段的任务是训练大脑抓关键词的能力。空出句中的关键词，如主语、部分谓语动词、表示时间或地点的名词、否定副词等，听完录音后将该词填上。

　　例“I don’t _____ how I could possibly _____ my _____exam.”

　　(录音原文：I don’t see how I could possibly pass my history exam.)

　　例“____ We’d called a taxi right away , we ____ been there on time.”

　　(录音原文：If We’d called a taxi right away , we would have beenthere on