China____(be)amodernandstrongcountryintwentyyears.
A. is
B. was
C. is going to be
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____you____(study)hardfromnowon?
A. Do/ study
B. Are/ study
C. Will/ study
She____(notspeak)Englishatthemeeting tomorrow.
A. doesn't speak
B. not speak
C. won't speak
--When____you____(leave)forToronto?--Tomorrow.
A. are leaving
B. do leave
C. will leave
创立植物矿质营养学说的学者是____。
A. Von Liebig
B. Slack
C. J.van Helmont
D. W.Garner