单选题 Understanding the cultural habits of another nation, especially ______ containing as many different subcultures as the United States, is a complex task.
A. one B. the one C. that D. such

【正确答案】 A

【答案解析】[解析] 根据语意及句子结构，此处需要一个代词，表示泛指，因此B项the one错误。the one一般表示特指概念，例如：Please get the chair for me, the one in the corner. 请帮我拿把椅子，墙角里的那把。而that一般代替带有定冠词的不可数名词，例如：The melting point of copper is not so high as that of iron. 铜的熔点不如铁的高。The volume of the earth is 49 times larger than that of the moon. 地球的体积比月球的体积大49倍。such用作代词时，相当于that，因此D项错误。