3. The word "it" (Para. 5) refers to ______.
B
[解析] 题目问:句子“who says it would have a tremendous impact on the local level”中的“it”涉及什么内容?通过阅读文章可知,Richard Shaw说,从根本上讲,有这项法案与没有这项法案的区别就像白天和黑夜之间的区别,这项法案将会对地方政府有重大作用。“it”指代“法案”。第五段中提到:“'On the ground, the difference between having this legislation and not would be the difference between night and day,' said Richard Shaw of the Harris County Central Labor Council, who says it would have a tremendous impact on the local level.”所以,应该选择B。