princeton模考上的两道语法题，大牛帮忙瞅瞅？

jennyang

今天早上做princeton的模考，有两道题不是很明白
The first political passengers on modern railroad cars were a president, a senator, and a governor that had been traveling to Washington D.C. together on the Liberty Express in 1907.
B. The first political passengers on modern railroad cars were a president, a senator, and a governor, who traveling
E. A president, a senator, and a governor were the first political passengers on the modern railroad cars traveling

the answer is B. 但是 "who" 按照OG原则不是修饰前面的 "a governor"的吗？

Although nearly 30 percent of the more than 9 million residents of New York City are African-American, the nation’s most populous city did not elect its first African-American mayor until 1989.
A.Although nearly 30 percent of the more than 9 million
B.Although nearly 30 percent of over 9 million of the

the answer is A
几位大牛讲讲定冠词的用法，我分辨不出来

hedgeforfun

我怎么错得和你一样？答案有问题吗？

jennyang

答案应该正确的，"the best"

第一道我是懂了
但第二题关于冠词的那道，实在不是很理解。郁闷。。。。。。

twelvecolors

我觉得the more than 9 million应该是特指new york的居民！

merlion

9 million of the residents of New York City : residents 中的 9 million, 暗示说 residents不止 9 million, 只提及其中一部分
9 million residents of New York City : residents 有 9 million, 提级全部