1.Olny when you have obtained sufficient data______a complete conclusion.A.would you B.can you 2.By the time you arrive in Shanghai,we_____in China for half a year.A.will have stayed B.have stayed C.shall stay D.have been staying

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1.Olny when you have obtained sufficient data______a complete conclusion.
A.would you B.can you
2.By the time you arrive in Shanghai,we_____in China for half a year.
A.will have stayed B.have stayed
C.shall stay D.have been staying

BA