____________和____________是生态系统的重要功能。生态系统要完成这些功能是沿着________和________进行的。-八年级生物

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• You didn’t have breakfast. You ________ be hungry now.A．mustB．can’tC．couldD．might-九年级英语
• It _________ rain this afternoon, but I am not sure.A．willB．canC．mustD．may-九年级英语
• Frank is my pen pal, he _____________ Sydney, Australia.A．livesB．fromC．comes fromD．be from-八年级英语
• Listen to the music. It _______ interesting. [ ]A. sound B. listen C. sounds D. listens -七年级英语
• —Must I take the medicine every day?— No, you______.A．must notB．may notC．haven’tD．needn’t-八年级英语
• My teacher ______ a little bit heavy.[ ]A. isB. has C. there is-七年级英语
• I have two sisters. One is a teacher, ____ is a singer. .A．otherB． anotherC． the otherD． others-八年级英
• 生态系统中，完成物质循环的两个关键性成分是（）A．生产者和消费者B．生产者和分解者C．生产者和非生物成分D．消费者和非生物成分-生物
• Tigers like to eat _____________, but koalas like to eat____________.A．meat , leaf B．meats , leafC．m
• 用am, is填空，注意大小写.① This_____mybook.②_____thathereraser?③ It _____ apen.④ Hername_____Jenny.⑤ What ___
• Oneandtwo______three.[ ]A.makeB.areC. isD.be-七年级英语
• When the traffic lights are red, we _______ stop.A．should B．might C．must D．may-八年级英语
• You’d better _______ too much meat. You are much too fat. A. not eat B .eat C. not to eat-八年级英语
• Our English teacher said she _______ speak three languages． A．couldB．canC．willD．is going to-八年级英语
• —How many teachers are there in your school? —About 160. One third of themmen teachers. [ ]A. have B
• 用所给词的适当形式填空1.--Where______ (be) New York?--It's in the USA.2._____your pen pal______(come) from
• —You____veryhappythisafternoon.Why? —BecausewearegoingtospendtheeveningatLily'shouse. [ ]A.tast
• 在草原生态系统中，鸟飞蝶舞，牛羊成群，草丛中还偶尔长有蘑菇，在这些生物中，一定不参与构成食物链的是（）A．鸟，蝶B．牛、羊C．蘑菇D．草-生物
• 用be的适当形式填空。①I____ astudent.②What____thatinEnglish?③Thekey____white.④How____you?-七年级英语
• The pay phone is _____Green Street and it’s across ______ the library.A．in, toB．on, fromC．at, throug
• You ______ be polite to the old man.A．shouldB．can’tC．mightD．mustn’t-八年级英语
• --- Must I finish the project now?--- No, you _. You_do it this evening.A．mustn’t; canB．needn’t; may
• 下图为一个水域生态系统的示意图，请据图回答问题：（1）藻类是生态系统中的，大鱼和小鱼是生态系统中的。（2）大鱼与小鱼之间是的关系。（3）和能量流动是生态系统的重要功能。在生-八年级生物
• 如图是一个农田生态系统的食物网，请据图回答：（1）该生态系统中的生产者属于______营养级．（2）无机环境中的二氧化碳通过绿色植物的______进入生态系统，生态系统中的碳元素又通-生物
• 用所给词的适当形式填空。1. I (be) born in Shanghai. 2. He enjoys (play) computer games. 3. Sandy (not like) list
• 在生态系统中，_________是碳循环中的重要物质。-八年级生物
• 从理论上来说，维持一个生态系统的存在，下列哪一项不是必要的（）A．生产者B．消费者C．分解者D．非生物的物质和能量-生物
• 如图是一个自制生态瓶，其中的绿萍等植物属于生产者，虾儿等动物属于______者，一些肉眼看不见的细菌等属于______者．生态瓶属于______（填“字母”A、水生生态系统B、陆生生态系-生物
• The dish looks good, but when I eat it, it ______ very terrible.[ ]A. tastesB. smellC. lookD. sounds
• 用be的适当形式填空。①IJenny.You _____Tony.②— What_____ yourname?— Myname _____Alice.③— What____thisinEnglish?
• —Don’t play with the knife, ______ you’ll cut your hand. —Sorry, I ______ .A．so; can’tB．and; won’tC．
• My grandfather us stories when I was young.A．was used to tellB．is used to telling C．used to tellD．us
• ---Who is the tallest boy? ---It ______ be John. John is of medium height.A．mustB．needn’tC．mightD．ca
• I _______ find my English book. Where is it? [ ]A. canB. am C. can't -七年级英语
• 生态系统中最基本、最关键的生物组成成分是（）A．空气B．分解者C．消费者D．生产者-生物
• 在进行模拟保护色的探究实验中，“实验中的你”扮演的角色是（）A．猎物B．捕食者C．幸存者D．旁观者-生物
• 下面关于生态系统的说法中，错误的是（）A．生态系统包括生物部分和非生物部分B．生态系统中的有毒物质是沿着食物链不断积累的C．生物圈是一个统一的整体，是地球上最大的生态系统-生物
• It _____ that Yu Mei has changed a lot. [ ]A. seem B. seems C. look D seemed-八年级英语
• A ruler and a pen ________ in the Lost and Found. [ ]A. is B. are C. has D. have -七年级英语
• 微生物或少数动物能把植物遗体或遗物中所含的______分解为______，所以称为分解者．-生物
• ----- Can you ride a horse? --------No, I ________.A．needn’tB．may notC．can’tD．mustn’t-九年级英语
• Susan’s parents bought a large house with a swimming pool. It ______be very expensive.A．canB．mustC．m
• —Where is Tom?—He hasn't come to school today.I think hebe ill.[ ]A. has toB. shouldC. mayD. ne
• Look! Grandma with her grandsonsplaying happily in the garden now. [ ]A. are B. is C. was D. were -八
• Today is Wednesday. He _______ be at home. He _____ be at school.A．can’t; canB．can’t; mustC．mustn’t;
• 组成生态系统的成分是（）A．全部的植物、动物和微生物B．全部的生产者、消费者和分解者C．生产者、消费者、分解者以及非生物的物质和能量D．全部的生产者、消费者、分解者和环境中-生物
• 如图是草原生态系的食物网，请据图回答．（l）一个完整的草原生态系统，除了图中所示的各种生物外，还应包括______．（2）此生态系统中的生产者是______，它与消费者之间形成_____-生物
• 用所给词的适当形式填空。 1. Could you(help) me with my lessons? 2. Peter do the(dish) in a fast food restaurant.
• It _____ that he has been ill for a long time.[ ]A. seems B. looks C. looks as if D. seems as if-八年级
• 如图是生态系统中物质循环示意图，请你将其中缺少的部分填完整．-生物