单选题 For ten years the problem about the water has not been solved, we came to think that it has been a ______ problem in this area.
A. perpetual B. persuasive
C. picturesque D. possessive

【正确答案】 A
【答案解析】perpetual永久的；persuasive善说服的；picturesque独特的；possessive所有的，物主的。