问题补充：
are written English.
A. Many a books; in
B. Many of the books; with
C. Many of the books; in
D. Many the books; with
答案：
A. Many a books; in
B. Many of the books; with
(答案→)C. Many of the books; in
D. Many the books; with
解析： many a 表示许多，后面跟单数名词；many of 表示许多，后面跟复数名词；用什么语言时介词用in。
