A big step____to strengthen China’s health care systems since we launched an effort in 2008.A.has be

题目简介

A big step____to strengthen China’s health care systems since we launched an effort in 2008.A.has be

题目详情

A big step   ____   to strengthen China’s health care systems since we launched an effort in 2008.
A.has been takenB.is being taken C.was takenD.had been taken
题型:单选题难度:偏易来源:不详

答案

A

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