The number of smokers, _____ is reported, has dropped by 17 percent in just one year. ( 章节：1 难度：2)
- A、which
- B、as
- C、it
- D、what
正确答案:B
答案解析:有
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The number of smokers, _____ is reported, has dropped by 17 percent in just one year. ( 章节：1 难度：2)
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