Where is Frank now? He _______ in the reading room. [ ]A．read B．reading C．reads D．is reading -七年级英语

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• _____ late again! The teacher is in the classroom. [ ]A. Not B. Don't C. Not be D. Don't b
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• 很早以前，我国劳动人民就学会了用桑叶喂蚕、蚕沙（蚕粪）养鱼、塘泥肥桑的方法，创造“桑基鱼塘”生态农业．随着科学技术的进步，“桑基鱼塘”也得到了不断的发展，人们改变蚕沙直-生物
• The dumpling and soup lunch 10 RMB. [ ]A. is B. hasC. are D. have -七年级英语
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• 如图所示为以草原生态系统中狼、草和兔的数量关系，请据图回答问题．（1）A代表的生物是______，B代表的生物是______，C代表的生物是______．（2）一般情况下，三种生物的数量总维-生物
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