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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:1096

. A nature reserve for white-flag dolphins was set up in 1992, _______ boats have been 
prohibited from sailing around since then.

A.where B.which C.when D.what
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.Anaturereserveforwhiteflagdol