Is there _______________ to sleep for half a day?A．somewhere enough silentB．somewhere silent enoughC

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• 几位同学针对食物链“草→食草昆虫→食虫鸟”发表了他们各自的见解，你认为不正确的是（）A．草属于生产者B．食草昆虫和食虫鸟都是消费者C．保护食虫鸟对人类有益D．多条食物链就可构成-生物
• 单项选择。Here some pencils for every teacher now. [ ]A. wasB. wereC. isD. are -七年级英语
• 单项选择。Everyone going to learn English? [ ]A. is B. are C. do D. does -七年级英语
• 图中箭头表示能量、物质的转化或流向．其中正确的是（）A．B．C．D．-生物
• They ______ friends since they met for the first time.[ ]A: have madeB: made C: have been D: were -八
• May I have a rest? I have already finished ______ the report.A．writeB．writingC．to writeD．written-九年级
• 小郭自制了一个密闭的生态瓶，要使模拟的生态系统维持更长时间，该生态瓶最好放在（）A．床柜上B．阳台上C．冰箱里D．衣柜里-生物
• —Can you speak English, Mr Wang？—Yes, but only＿＿＿A. little B. a little C. a lot-九年级英语
• Don’t worry. There’s still ________ time _________.A．few, leftB．a few, to leaveC．a little, leftD．a l
• 图是大金湖湖泊生态系统，请据图回答问题：（1）影响该生态系统生物生存的非生物因素有______（举一例）；（2）该生态系统中的生产者有______，未标注的生物部分是______；（3）螺蛳的-生物
• 在草原生态系统中，下列哪条食物链的加强有利于增加鹰的数量（）A．草类→鼠→鹰B．草类→鼠→蛇→鹰C．草类→蝗虫→青蛙→蛇→鹰D．草类→食草昆虫→青蛙→蛇→鹰-生物
• 在一个处于相对平衡状态的封闭生态瓶内，要使各种生物长时间存活，最重要的条件是提供（）A．太阳能B．足够的有机物C．充足的氧气D．水分-生物
• 近几年海洋石油泄漏事件多次发生，给海洋环境造成严重污染．科学家们利用一些细菌来清除洋面泄漏的石油以便净化海洋环境．这些能净化环境的细菌属于（）A．生产者B．消费者C．分解者-生物
• －Dad, may I watch TV?－No, you can’t. You _______ finish your homework first.A. must B. can C. may-九年
• —I lost my pet pig, but it came back yesterday.—As the saying goes: an old horse knew the way.A．塞翁失马
• The first question was difficult, but the rest were pretty easy.A．休息B．安定C．其余的D．停止-九年级英语
• How dangerous! She was driving the car with one hand and holding an ice cream with ____.A．the otherB
• 生态系统的构成是（）A．森林里所有的动物和植物B．校园里的各种花卉C．麦田里所有的生物D．池塘及池塘里所有的生物-生物
• --Is the man standing outside the teacher’s office Mr. Zhou?--No, it ______ be him. He has gone to H
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• 在一个生态系统中，不可缺少的生物成分是（）A．生产者、消费者、分解者B．各级消费者C．生产者、分解者D．生产者、初级消费者-生物
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• 单项选择。Don't ___ so excited. You must be calm (镇静). [ ]A. is B. are C. be D. am -七年级英语
• 单项选择。Mary and her father ______ in Beijing last month. [ ]A. was B. were C. are D. is -七年级英语
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• Though today is bright, it __ be rainy tomorrow.[ ]A. can B. isC. willD. must-八年级英语
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• --- Linda late for school. --- But she arrives on time at present.A．used to beB．used to beingC．is us
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• —________ do you like dogs?—Because they are very cute. A. WhatB. How C. Why-九年级英语
• Youhaveworkedallday. You_______betired.[ ]A. mustB. can't C.could D.might -九年级英语
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