According to the recent research, heavy coffee drinking and heart attack is not necessarily and effect
A. reason
B. impact
C. fact
D. cause
网友回答
A. reason
B. impact
C. fact
(答案→)D. cause
解析：句意：最近一项研究证明，过量饮用咖啡与心脏病并没有必然的因果关系。本题考查短语用法。cause and effect为固定短语，意为“因果关系”。reason原因；influence影响；fact事实，都不符合题意。