The spokesman said that this was a（n） negotiation （谈判） because it solved a lot of problems between the two sides．
A. attractive
B. defensive
C. protective
D. productive
网友回答
A. attractive
B. defensive
C. protective
(答案→)D. productive
解析：词义辨析。attractive 吸引人的；defensive 防守的；protective保护的；productive富有成效的。句意：发言人说这是一次富有成效的谈判因为它解决了双方之间的很多问题。所以选D。