There are some dangerous fishes in this river, and I'vewarned Jack _____ here.[ ]A. not to swim

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• 生物分类的依据是生物在_______方面的特征。[]A．形态结构B．生理功能C．形态结构和生理功能D．外部形态-八年级生物
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• Tomorrow's meeting is very important. Please ask them __ there on time. [ ]A. goB. going C. to
• Hewanttobethefirstone ______totheparty.[ ]A. getB. getting C. toget D. gets -七年级英语
• —Why didn't you buy some bread on your way home?—Sorry, I forgot _____ some money withme. [ ]A.
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• Be sure___him about the bad news.[ ]A. to not tellB.not to tellingC. not to tellD.to not telling-九年级
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• TheywantedaChineseengineer_____therailroad. [ ]A.builtB.tobuildC.buildD.builds -七年级英语
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• Please use sunlight _____ food. [ ]A. make B. making C. to make D makes -八年级英语
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• 在校园里，观察你最喜欢的一棵树，了解它的各个器官，并把它们描述出来。观察的目的______________________________________________。观察的顺序_________
• 对调查的生物，可以有多种归类方法，如可以按形态结构，将生物归为________、_________和________三大类。按生活环境可以分为________生物和_________生物等。-七年级生
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