--Listen! Is it Linda singing in the next room? --No, it __________ be her. She is still in Shanghai

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• George's records _______ very successful after the Beatles. [ ]A. was B. were C. are D. is -七年级
• —Must we finish the homework before six?—No ,you ____. You may do it tomorrow. [ ]A. mustn’tB. may n
• The tour guide has made the route for the school trip. We don’t need to __ that. A. be worried about
• Drivers shouldn’t be allowed _______ after drinking, or they will break the law. A. drive B. driving
• —Dowehavetofinishourhomeworktonight?—Yes, you______. [ ]A.mustB.canC.mayD.need -九年级英语
• — _____ you tired? — Yes, I _____. [ ]A. Do; do B. Did; do C. Are; am -八年级英语
• 假设某生态系统中有甲、乙、丙三种生物，他们的捕食关系如右图所示．那么该系统中属于生产者的是（）A．甲B．乙C．丙D．乙和丙-生物
• 在生态系统中，物质是循环的．生产者能把二氧化碳和水这些无机物制造成有机物，下列（）能把有机物再转变成二氧化碳和水等返回无机环境中．A．生产者B．消费者C．分解者D．以上都是-生物
• The talented boy _________ write lyrics when he was at the age of ten. A. may B. could C. must-九年级英语
• At last the boy was made and began to laugh.A．stop cryingB．to to stop to cryC．to stop cryingD．stop t
• Mr Johnson _______ a child at the start of the 1950s. [ ]A. is B. are C. was D. were -七年级英语
• 在生态系统的各种成分中，______能够把复杂的有机物分解成______归还到环境中被植物等生物再利用．-生物
• — How was the youth club last night, Mark? — It was great fun. You ______ come. [ ]A. must B. can C.
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• — What are you looking for, Michelle?— My cousin's MP3 player. It ______ right in here, and now
• He went into his room,the light and began to work.A．has turned onB．turned offC．turned onD．has turned
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• 生态系统具有一定的稳定性，下列关于生态系统的描述中，错误的是（）A．生态系统包括生物部分和非生物部分B．生态系统的营养结构是食物链和食物网C．太阳是食物链的组成部分D．生态-生物
• Both you and Igood teachers. [ ]A. are B. is C. amD. was -九年级英语
• 在自然界，生物之间的信息交流是普遍存在的．正是由于______、______、______的存在，使生物之间的联系错综复杂，生物与环境才成为统一的整体．-生物
• 自然界中的虎、豹等大型肉食动物，在种类和数量上均比其他动物少得多，造成这种现象的主要原因是（）A．大型肉食动物繁殖能力低B．它们在食物链中所处的营养级较高C．这些动物被人-生物
• --What do you think of the book you borrowed from the library yesterday?--I have no idea. I_________
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• 如图为三个处于不同环境的生态瓶（将A，B瓶置于有光条件下，C瓶用不透光的盒子罩住）．请分析回答下列问题：（1）探究“光对生态系统的稳定性是否有影响”这个问题，应选择______瓶与-生物
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• There ______ a number of people in the airport. The number of people who travel by plane ______ larg
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• 小科同学走近一鱼塘边的某一位置时，鱼塘中的鲤鱼便会成群地向他游来，并逐渐向他聚集，如图所示．（1）对此现象的解释最合理的是______．A．鲤鱼本身具有亲近人的特性B．鲤鱼本身-生物
• — Good morning. I've got an appointment with Ms King in her office.— Morning. You _______be Mr
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