用所给单词的适当形式填空。1. There _____(be) one desk and two chairs in the classroom. 2. There _____(be) three c

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• You ___________ finish the report today. Any time before this weekend is OK.A．mustn’tB．needn’tC．must
• 看图完成下列问题：在一片草原的生态系统中，昆虫以草为食，青蛙以昆虫为食．三者的相互关系用右图表示，图中各长方形的面积分别表示上述三种生物的数量，长方形越长表示该生物-七年级生物
• 在生态系统中______是生产者，能通过光合作用制造有机物；绝大多数______作为消费者，他们直接或者间接地以植物为食，营腐生生活的细菌、真菌是分解者．-七年级生物
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• The light is still _________. Mr. Green _________ at home now. [ ]A. on, can be B. down, may be C. o
• 下列生物中属于消费者的是（）A．草B．食虫鸟C．细菌D．蘑菇-七年级生物
• 消费者指（）A．能自己制造有机物的生物B．不能自己制造有机物的生物C．能分解有机物的生物D．以上都不对-七年级生物
• —Hurry up, Mum. The lights are turned on. Dad has been back.—It _________ be him. He has gone to Sha
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• Simon's shoes _____white. So this pair of shoes _______ his. [ ]A. is; is B. are; areC. is; are
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• This toy Mickey Mouse _______be Amy's. she's the only kid at the picnic.A．mustB．canC．needD
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