The little girl does reading well,but she more listening.?[ ]A.can practise B.should practise C.woul

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• He is very strong.He _____ lift the heavy box. [ ]A. canB. needC. mustD. have to-八年级英语
• -What are you going to do tomorrow?-_______ I _______ go hiking.[ ]A.Maybe; willB.Maybe; wantC.May b
• —May I watch TV, Mom?—I'm afraid you _______.[ ]A. should notB. can'tC. must notD. may not
• 大多数细菌和真菌是生态系统中的（）A．非生物成分B．生产者C．消费者D．分解者-生物
• —_____ Iwatch TV now, mum? —No, you can't. You _____ do your homework first.[ ]A. Do; can'
• -Where is Tom?-He hasn't come to school today. I think he __________ be ill.[ ]A. has toB. shou
• 所有生物生命活动的能量最终来源于__________。-八年级生物
• 生态系统中，________和_______是沿着食物链和食物网而流动的。-八年级生物
• 在一个食物链中，兔不会吃狼，食物不能倒流，这就造成了生态系统中[]A．氧循环是单向的B．碳循环是单向的C．水循环是单向的D．能量流动是单向的-八年级生物
• 生态系统的能量流动是指[]A．太阳能被绿色植物固定的过程B．生态系统内生物体能量代谢的过程C．生态系统内伴随着物质循环的能量转移过程D．能量从生物体进入环境的过程-八年级生物
• Boys, you ____ be sitting in this room. It is for your teachers only.[ ]A. shouldn'tB. don'
• —Your mother look a bit disappointed. You__ have told her the truth. —Yes, I have told her about the
• —Can I borrow some money?—Sorry, you ______. [ ]A. mustn’t.B. can’t. C. don’t. D. may not.-七年级英语
• 一般地说，在食物链中，随着营养级的递增，生物个体的数量将依次[]A．递增B．不变C．递减D．稍增加-八年级生物
• 如图所示某生态系统中各成分之间相互依存的关系，请据图回答：（1）图中细菌在生态系统组成成分中属于______者，其生殖方式是______生殖．（2）绿色植物能利用光能，将水和二氧化碳-生物
• 生态系统一般都包括（）A．生产者、消费者、分解者B．生产者和非生物部分C．生产者、消费者、分解者和非生物部分D．消费者和非生物部分-生物
• 从物质循环的观点来看，动物体中碳元素究其来源是[]A．蛋白质中含有的碳B．糖类中含有的碳C．大气中的二氧化碳D．非生物碳酸盐中的碳-八年级生物
• 南极地区从未施用过农药，但我国南极考察队却从企鹅体内测到了一定浓度的农药。这说明了什么问题？-八年级生物
• You _______ walk across the road. It’s dangerous.[ ]A. may notB. don’t have toC. must notD. needn’t-
• —_____ I open the window, Mum? —No, you _____. It's cold outside.[ ]A. Can, may not B. Can, mus
• To make our city more beautiful, rubbish ________ into the river. [ ]A. needn't be thrown B. mu
• 在“草→昆虫→青蛙→蛇→鹰”这条食物链中，含能量最多的是[]A．草B．青蛙C．蛇D．鹰-八年级生物
• You ______ do it even if you don't want to.[ ]A.can't B. mustn'tC.have toD.needn'
• -Must I park my car behind the building?-No, you _______. You _______ park it there.[ ]A.mustn'
• I'm sorry I ________visit next week.[ ]A. can't B. don't C. mustn'tD. won't
• 一个山丘长满马尾松、灌木、草本植物，树上有松鼠、松毛虫、捕虫的山雀、鹰，树下有苔藓、地衣、真菌等．据此回答下列问题：（1）上述环境及所有生物共同构成一个生态系统，从其-生物
• 在自然界的物质循环中，能把动植物遗体分解成二氧化碳、水和无机盐的一类生物是______．-生物
• 下面是某生物小组的“探究生态系统中动植物的数量关系”研究性课题的有关实验过程，请分析并回答问题．实验用具及材料：小虾、蚂蝗、水草、洗净的沙子、池水、有盖玻璃瓶．说明：4-生物
• Another popular idea is that the Stonehenge_ a kind of calendar. [ ]A. must be B. can't beC. mi
• Tony said that Lily _____ the pages of your diary.[ ]A. numberB. are numbering C. should number D. n
• Jeff can't come to the party, because he'll _______ help his mom. [ ]A. mustB. has to C. h
• —Can you give me a hand, Robin?—But, Helen, you ____ my help every five minutes. I ___ TV now.[ ]A.
• 腐生性微生物能将复杂的有机物分解成简单的______，供绿色植物再利用，因此，他们是生态系统中的______．-生物
• 有毒物质会沿着食物链和食物网流动、传递。[]-七年级生物
• Everyone _____ a good habit from an early age.[ ]A. startB. is startingC. are startingD. should star
• 生态系统中的能量最终来自[]A．植物体B．微生物C．动物体D．太阳能-八年级生物
• —This winter H1Nl has become very popular in our country. —Don't worry, itby our government.[ ]
• 羊吃草可以得到这些草所固定的太阳能总量的[]A．全部B．一半C．大部分D．小部分-八年级生物
• —Can you give me a hand, Robin?—But, Helen, you_____ my help every five minutes. I______ TV now.[ ]A
• — What can you do?— I_____ play football.[ ]A. canB. shouldC. may D. would-七年级英语
• -__________ you play tennis?-No. But I am good at playing football.[ ]A. CanB. MayC. MustD. Should-九
• —_________ I answer your question in Chinese? —No, you mustn't.[ ]A. MayB. CanC. MustD. Do-九年级英
• 下图为生态系统碳循环示意图，请据图回答下列问题。（1）由图可知，碳在生态系统中主要以_________的形式进行循环。（2）大气中的二氧化碳首先依赖于图中②所代表的_________进入-八年级生物
• 肉类和鸡蛋的价格比粮食和蔬菜高，从生态学的观点看，这是由于[]A．饲养动物麻烦，时间长，投资大B．动物性食品营养价值高C．食物链延长，能量流失多，动物性食品成本高D．栽培植-八年级生物
• —Jack.All the young trees____at once. —OK.I'll do it at once.[ ]A. must be watered B. must wate
• —I like the party so much, but I_ go home.It's too late.—What a pity! [ ]A. have to B. mustn�
• 能量流动和物质循环是生态系统的两个密切相关、不可分割的过程。[]-八年级生物
• I __________ dance but I___________ dance well.[ ]A. can; canB. can; can'tC. can't; canD.
• 下图是自然界碳循环的简图，图中甲、乙、丙各代表[]A．生产者、分解者、消费者B．消费者、分解者、生产者C．分解者、生产者、消费者D．生产者、消费者、分解者-八年级生物
• If I went to the moon,I _____ bring something unusual back to school.[ ]A.willB. canC. wouldD. shall