Which sentence contains an inverted structure? A. Not only does she speak French, but she also knows Arabic. B. The results of the experiment were surprisingly positive. C. Having finished the report, he left the office. D. It was in September that we launched the product. 答案解析 核心考点：倒装句的识别。解题思路：选项A中'Not only'位于句首引起部分倒装（does she speak），符合倒装规则。选项B为正常语序，选项C为分词短语作状语，选项D为强调句型。易错点：混淆强调句与倒装句的结构差异。 正确答案：A