All , whether large or small, has never been lost sight of and is always appreciated by th

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(答案→)A. contribution
B. coincidence
C. conflict
D. convenience
解析：考查名词：A. contribution贡献，捐赠，B. coincidence巧合，C. conflict冲突，D. convenience方便，句意：所有的捐献，不管大小希望工程不会看不见，总是会感激的。选A。