D 可以轻松排除,因为至少published 至少要紧跟 "Maple Leaf Rag" ,不然意思上好像是the composter was published in 1899
另外按照LZ对于help的理论,D也是help establish
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同意D是错的。但HELPED ESTABLISHED确实有问题
语法区的帖子
http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=135645&page=1
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