补充 141

        In the last ten years, the dropout rate among Black high school students fell substantially over the past decade, while the number of Blacks who attend college is more than twice what it was.

(C) has fallen substantially, while the number of Blacks attending college has more than doubled

我同意选C 但  这个 In the last ten years 给我太大的勇气一上来就把它给排出了. 有人能讲讲为什么 不用过去时呢? 明显的时态错误啊?  谢谢

啊? 那也是要过去时把?? 不好意思啊不明白耶

姐姐心肠真好~~ 考好了试以后我们一起出去狂欢把~~我是MM

GMAT里，in the past n years, in the last n years  基本上都要求完成时。