—When ______ you born, David? —I ______ born in 1995. [ ]A. was; were B. were; was C. were; were D.

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• 在菜园里，蚯蚓昼伏夜出，以凋落的黄叶、腐败有机物为食，排出的粪便中含有丰富的氮、磷、钾等无机盐．蚯蚓在土壤中活动，可以以疏松土壤，改善土壤结构．（1）蚯蚓在此生态体统-生物
• 下列关于生态系统的叙述，错误的是（）A．生态系统无论大小，都是由生物部分和非生物部分组成的B．一个生态系统中，往往有很多条食物链，它们彼此交错连接，形成食物网C．动物和植-生物
• —Congratulations! Among the best pictures in the competition，I found _______. Why did you draw it?一D
• — Have you decided where to spend your summer holiday? — Not yet. We _____ go to Qingdao. [ ]A. must
• There a teacher and three boys over there. [ ]A. be B. is C. am D. are -七年级英语
• 1935年澳大利亚为控制甘蔗害虫而引入的有毒蔗蟾如今已成为新的生物灾难．面对泛滥蔗蟾，科学家打算利用与蔗蟾活动时间不同的食肉蚁来控制蔗蟾数量．下列有关叙述不正确的是（）A-生物
• Every year many babies ______ born. [ ]A. is B. are C. was D. were -八年级英语
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• 下面是温带草原生态系统示意图，请认真观察下图后分析并回答下列问题：（1）该生态系统中，各种生物进行生命活动所需能量的根本来源是______．（2）从组成生态系统的成分看，图中未-生物
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