单选题 The affluent middle class created by the Asian boom now take up over from exports as the main engine of growth.
【正确答案】 D
【答案解析】[解析] 本题考查习惯搭配和动词的时态。take sth. as sth.为固定用法,意为“把……看做”。the middle class是集合名词,其作主语时,后面跟动词的第三人称单数形式。所以,答案是D。