There are advantages and disadvantages to【21】Asian and Western educational method．For example, one a

There are advantages and disadvantages to【21】Asian and Western educational method．For example, one advantage【22】the education in Japan is that students there learn much more math and science【23】American students．They also study more hours each day than Americans【24】．The study is difficult, but it【25】students for a society that values discipline(纪律)and self-control．There is, however, a disadvantage．Memorization is an important learning method in Japanese schools,【26】many students say that after an exam, they forget much of the information that they have memorized. The advantage to the education in North American,【27】the other hand, is that students learn to think by themselves．The system prepares them for a society that values【28】ideas．There is, however, a disadvantage．When students graduate from high school, they haven't memorized【29】many basic rules and facts as students in other countries【30】. (41) A. not only B. all C. both D. only

我们先看题目语境。

题目说：There are advantages and disadvantages to ______ Asian and Western educational method.
意思是 “亚洲和西方的教育方法都有优点和缺点。”

这里要填一个词或短语，表达“两者都”的含义。

选项：

A. not only（不仅……但句子里没有对应的 but also 来搭配，不太合适）

B. all（all 后通常接复数名词 methods，而这里是单数 method，不搭配）

C. both（both...and... 固定搭配，both Asian and Western educational method 语法上成立，相当于 both the Asian and the Western educational method）

D. only（“只有”意思不符合句子要表达的“两者都有优缺点”的意思）

因此正确选项是 C. both。