摘要：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．witnessed B．were witnessed C．had witnessed D．have witnessed
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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.
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A．witnessed |
B．were witnessed |
C．had witnessed |
D．have witnessed |
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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.witnessed
- B.were witnessed
- C.had witnessed
- D.have witnessed