1. _____ five hundred people are believed to have drowned.
A. As many as B. As much as
C. So many as D. So much as
解析：首先B、D不对，因为much后面修饰不可数名词; as many as 与…一样多，后面可以接具体的数字;而C项不正确，因为：so many as 如此众多的，后面不能出现具体的数字。
2. I didn’t finish reading that French book, neither _____ .
A. did he B. didn’t he C. he did D. he could