Although （） happened in the developed country sounds like science fiction, it could occur elsewhere in the world. ( 章节：2 难度：2)
- A、which
- B、what
- C、how
正确答案:B
答案解析:有
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Although （） happened in the developed country sounds like science fiction, it could occur elsewhere in the world. ( 章节：2 难度：2)
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