17.Scientific(science) research is widely claimed to be the source of high standard of living in US.
11.-What you in the classroom at the moment?
-The coming charity show for Yingjiang,Yunnan.( )
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-The coming charity show for Yingjiang,Yunnan.( )
A. | are,talking about | B. | did,talk about | ||
C. | have,talked about | D. | do,talk about |