第3题: [单项选择]According to the passage, what is the major driving force behind the progress toward more literacy______ A. The amount of education B. The availability of reading materials C. The economic development D. The necessity to read 参考答案:D 答案解析:第二段第一句指出,在这些因素中,用途是最关键的。与(D)“阅读的必要性”相符。