摘要： Once employed, Simon to Africa to do the market research. A. is sent B. has been sent C. was sent D. will be sent [解析]选D.考查时态及语态.根据前半句“once employed 可知.被送到非洲去进行市场调查这个动作发生在将来.且Simon与send是被动关系.故选D.

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