Their products enjoy 30 percent of the market in this country because both the quality and their service are fine.
A. share
B. profit
C. possession
D. advantage
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(答案→)A. share
B. profit
C. possession
D. advantage
解析：考察名词辨析,share份额profit利益possession财产advantage长处,句意是他们的产品拥有30%的市场份额因为他们的质量和服务都很好,故选择A。