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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 2082

A recent study has found that the number of smokers ________ sharply over the past five years.

A.is increasing
B.are increasing
C.has been increasing
D.have been increasing
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Arecentstudyhasfoundthatthenum