Since the Obama administration took office, the China—US relations ________ positive development tha

题目简介

Since the Obama administration took office, the China—US relations ________ positive development tha

题目详情


Since the Obama administration took office, the China—US relations ________ positive development thanks to joint efforts of both sides, President Hu said at the Nuclear Security  Summit in Washington, April,12,2010.
A.witnessedB.were witnessedC.had witnessedD.have witnessed
题型:单选题难度:偏易来源:不详

答案

D

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