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ActiontoimproveourcitytrafficsofarA.hastakenB.hasbeentakenC.hasdoneD.hasbeendone
题目详情
Action _________ to improve our city traffic so far
A.has taken
B.has been taken
C.has done
D.has been done
A.has taken
B.has been taken
C.has done
D.has been done
▼优质解答
答案和解析
B
现在完成时+被动语态
现在完成时+被动语态
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