Roughly one-half of the world's population, including virtually all of East and Southeast Asia also, is wholly dependent on rice to be its staple food.


including virtually all of East and Southeast Asia also, is wholly dependent on rice to be

including virtually all of East and Southeast Asia, is wholly dependent on rice as

virtually all of East and Southeast Asia as well, wholly dependent on rice as

which includes virtually all of East and Southeast Asia's, being wholly dependent on rice as

which includes virtually all of East and Southeast Asia also, is wholly dependent on rice to be

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考题讲解

题目分析：

本题较短，看起来在考查英语的习惯表达，实际上考查了真正的逻辑理解能力。

选项分析：

选项A：选项最后的不定式短语to be必须改为as，这点考查了不定式和名词的区别。用之于本题，短语be dependent on的约束力较差（依赖于某事，则这件事是否发生和其被依赖与否没有什么关系，例如，如果米饭本身不能作为食物，那任何人依赖了，也没用），所以只能用as + 名词的形式，不能用不定式短语。

选项B：Correct. 本选项在语法和逻辑上均是正确的。

选项C：本选项使得整个主句缺少谓语动词。

选项D：本选项使得整个主句缺少谓语动词。 

选项E：to be应改为as，该错误同选项(A)。

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