下列各种生物全部为生产者的一组是（）A．蘑菇、酵母菌B．芦荟、大肠杆菌C．水稻、海带D．蜘蛛、绵羊-生物

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• As we’re students, we __________ obey the school rules.A．canB．mayC．mustD．could-九年级英语
• －Look, your sister is playing the piano over there.－She ______ be my sister. She has gone to America
• —I can't give up smoking, doctor.—For your health, I'm afraid you _____.[ ]A. may B. can C
• 选择填空。—______ you like The Sound of Music?— Yes. ______ interesting. [ ]A．do, it's B．Do, It'
• Do you have any shoes can match the dress?A. attracts B. attracted C. has attracted-九年级英语
• 如果用一个小型生态瓶模拟一个生态系统，设计实验时，不需要考虑的因素是（）A．外界氧气B．光照C．瓶内生物的种类和数量D．温度-生物
• 王亮在做校园调查时，作了如下记录：在一棵阴湿的、一侧干枯轻微腐烂的大树下，观察到：腐烂的树干上及露出的树根旁长了一些蘑菇；树冠向阳的一侧，树叶比较茂盛，嫩叶上见到了-生物
• Don't go out to play. You ________ finish your homework first. [ ]A. must B. have C. had D. had
• Could I look at your picture? --Yes, of course you ______.A．couldB．canC．willD．do-八年级英语
• —Look at the man in the classroom! Is he Mr. White?—No, it __________be him. He’s eating in the dini
• 单项填空。Canada, the U.S., the U.K. and Australia ______ English-speaking countries. [ ]A. is B. are C.
• 在一个生态系统中，除了生产者、消费者和分解者外，还包括______．-生物
• There is a saying "No news ____ good news". [ ]A. is B. are C. be D. will be -七年级英语
• You worry about me. I’m fine. A. can’t B. mustn’t C. needn’t-九年级英语
• 某生态系统中含有鹿、蛇、猫头鹰、草、兔、鼠等生物，其间关系如图所示，下列因素能使猫头鹰增多的是（）A．蛇多、鹿多、草少B．鹿少、蛇多、鼠少C．兔少、草少、鼠少D．蛇少、草多-生物
• —Bill, is the pink umbrella Anna's? —No, it _____ be hers. Hers is purple. [ ]A. might B. must
• – Physics _____ more difficult than Chinese, do you think so? -- Yes, I think so. A. is B. are C. ha
• 人类在生态系统中扮演的角色是（）A．生产者B．生产者和消费者C．消费者D．消费者和分解者-生物
• —I can’t stop smoking, doctor.— For your health, I’m afraid you ______. A．mayB．canC．have toD．need-九年
• —______ is “CHINA NEWS” shown on CCTV-4? —Every day. A．How oftenB．How many timesC．How longD．How soon
• If you are in the zoo, remember not to touch or go near the animals. Although some of the animals ar
• --- Mum, could I play with my classmates for a while after I finish my homework? --- _______. But yo
• 单项填空。Where _____ you from? [ ]A. are B. is C. do D. does -七年级英语
• 生态系统中生物因素包括生产者、消费者和______．-生物
• The little girl should______more hot water. [ ]A.drinkB.drinks C.drinkingD.drinked-八年级英语
• 生态系统是指下列哪两种成分彼此作用而构成的一个统一整体（）A．生产者和消费者B．生产者和分解者C．生物和非生物环境D．生产者和环境-生物
• ____ Simon good at English? [ ]A. Do B. Are C. Does D. Is -七年级英语
• Tom and I good friends. [ ]A. is B. am C. are D. be -七年级英语
• If prices rise too high, the government has to do something _________ it. A．stopB．stoppedC．stoppingD
• 选择填空。The little girl ______ afraid of the dogs. [ ]A．doesn't B．isn't C．can't -七年级英语
• — Can I go to the movie, Mum? — Certainly. But you be back by ten o'clock. [ ]A. can B. may C.
• ______ you don’t give up, your dreams will come true. A. As long asB. As soon as C. As well as-九年级英语
• —______ I put the bike here?—No, you can't.[ ]A. MayB. MustC. NeedD. Shall-八年级英语
• 如图为民谣“螳螂捕蝉，黄雀在后”所描述的生态系统中各种成分之间相互依存的关系图，请据图回答：（1）绿色植物、细菌、真菌和其他三种动物组成了生态系统中的______成分；（2）请-生物
• 如图表示某个生态系统中各种成分之间的关系，图中的①所代表的成分名称是（）A．生产者B．消费者C．分解者D．非生物的物质和能量-生物
• —What's in the reading room?— There a teacher, twenty desks and thirty chairs in it. [ ]A. am B
• There ____ a pen, a ruler and two books on the desk. [ ]A. is B. are C. aren't D. am -七年级英语
• 单项选择。Look at the monkeys. ______ they cute? [ ]A．Isn't B．Aren't C．Don't -七年级英语
• 单项选择。—How much ______ the blue socks? — They ______ only one dollar. [ ]A．is, are B．are, isC．are, ar
• Where ______ the post office? [ ]A. are B. is C. does D. do -七年级英语
• — Who’s singing in the next room?— It ____ be her . She has gone to New York.A．can’tB．mustC．shouldn’
• —Must I go with them tomorrow?—No, you . A. mustn’t B, shouldn’tC. needn’t D. can’t-九年级英语
• That young woman _____a teacher. She looks very graceful.[ ]A. may be B. can beC. must beD. won'
• “神舟”七号宇宙飞船顺利返航，三位宇航员除了把生活用品包装带回地球外，他们的尿液、粪便也要一并带回．这是因为太空中（）A．缺乏分解者B．没有消费者C．缺乏空气D．温度太低-生物
• If you _____the book, you ____ buy it right now, I think.A．needn’t, needn’tB．don’t need, don’t needC
• 单项选择。Lily and Linda ______ good friends. [ ]A. amB. isC. are D. be -七年级英语
• “花草”在生态系统中扮演的角色是（）A．消费者B．生产者C．分解者D．非生物部分-生物
• 改错。1. My favorite subject is math and English. 2. Why do she like music best?3. What's you favo
• —How many students are there in your school?—the students in our school over two thousand. A．The num
• 如图是某草原生态系统中的食物网示意图，请根据图回答问题．（1）在此生态系统中青蛙和蜘蛛除了捕食关系外，还有______关系．（2）在草原生态系统的组成中，图中未画出的生态系统的-生物