____you____(study)hardfromnowon?
A. Do/ study
B. Are/ study
C. Will/ study
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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
第一个用科学实验来探讨植物营养本质的人是____。
A. J.
B. van Helmont B.
C. Slack C.W.Garner
D. Von Liebig
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