单选题 The affluent middle class created by the Asian boom now take up over from exports as the main engine of growth.
A. take over from exports B. take from exports
C. take exports D. takes exports

【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。