首先，B main idea is to introduce "Repousse is......." ,whereas D main idea is "workers do...." 意思有偏差。 1）“do repousse, a method of sculpture.” a method of sculpture
是repousse 的同位語，也没有dangling modification。但是a method 作do的宾语不妥。 2）没歧义，using a variety of exotic hammers
分词短语修饰动词pound
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