题目信息
Unlike that of earlier works on slavery, Blassingame's innovative study relies not on the records of White slave owners but on the records of the salves themselves, especially the 70 or so autobiographies and memoirs that have been preserved.
A:that of earlier works on slavery, Blassingame's
B:that of earlier works on slavery, Blassingame in his
C:earlier works on slavery, Blassingame in his
D:earlier works on slavery, Blassingame's
E:the earlier works on slavery, Blassingame in his
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正确答案：
D:earlier works on slavery, Blassingame's
比较双方要具有可比性。因为开头是说 earlier works on slavery，所以主语也是这类的著作，而不能是 Blassingame。
所以 B、C、E 都不对。
再看A，发现A的that of无所指，多余，排除。
所以正确答案选D。
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