Mike said that he had walked 50 miles the day before, hut I didn't believe that he could walk ________.A.very farB.any fatherC.quite farD.that far
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D解析选项D中的that不是指示代词，而是一个副词，其词义是：to such a degree, so；达到这样的程度：那么，那样，这么．另一个我们所熟悉的词this也有相同的用法．that和this常用来修饰形容词和副词．