It is usually warm in my hometown in March, but it ____be rather cold sometimes.A．mustB．canC．shouldD

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• This book _____ Lucy’s. Look! Her name is on the book.A．must beB．may beC．can’t beD．mustn’t be-八年级英语
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• An eraser and a bookon the table.[ ]A amB isCare-七年级英语
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• ____ I fill in the application form right now, sir? No, you needn’t. You can complete it this aftern
• be动词的适当形式填空1. —What color _______ your pencils?—They _______ blue.2. —How ______ Frank? —He ______ f
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• 用直线将相关内容链接起来．生产者细菌、真菌消费者植物分解者动物．-生物
• 一条食物链中，兔子不吃狼，但狼吃兔子，该食物链的不可逆性说明一个生态系统中（）A．氧循环是单向的B．水循环是单向的C．碳循环是单向的D．能量流动是单向的-生物
• A: Listen! Is it Linda singing in the next room? B: No, it __________ be her. She is still in Shangh
• These are some students and that _________ their teacher.[ ]A. is B. am C. are D. be -七年级英语
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• 某动物能促进生态系统的物质循环，这是指它（）A．能合成有机物B．能分解有机物产生CO2、尿液，以便被生产者利用C．产生的粪便及其死后的遗体能被分解者分解，释放CO2等物质D．B、-生物
• How much_____ these carrots?[ ]A. areB. isC. doD. does-七年级英语
• — Well, let's go to visit the amusement park this Saturday.— That _______ great. [ ]A. feels B.
• 用所给动词的适当形式填空1. Special 2 _______ (be) only 2 RMB for 10, and _____ (have) cabbage and mutton.2. Than
• — Shall we meet at the station at 8 a.m.? — In fact we _________. The train _________ until 10 a.m..
• 下列各组生物中，属于生产者的是（）A．蘑菇和青菜B．河蚌和海带C．水草和小麦D．病毒和玉米-生物
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• 能够把生物体内的有机物分解成二氧化碳并释放到无机环境中的生物是（）A．生产者B．消费者C．分解者D．以上都是-生物
• 从物质循环的观点看，人体内碳元素的最终来源是（）A．食物所含有机物中的碳B．非生物界中的碳酸盐C．大气中的二氧化碳D．生态系统中生产者-生物
• 在生态系统中，与碳循环始终结合在一起进行的是（）A．氮循环B．水循环C．能量流动D．能量循环-生物
• —______ you please tell me something about the life in Canada? — Sorry, I______ . I don’t know eith
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• （1）生态系统的成分包括非生物的______、生产者、______和______．因此，在草原生态系统中，除图中表示出的各种生物外，还必须有______等生物类群．（2）在生态系统中，不同生物之-生物
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• I’m very glad I have my own room in my house. I ______ do what I want in it.A．mustB．have toC．needD．c
• Li Lei and I ______ good friends.[ ]A. areB. am C. is D. be-七年级英语
• You ______ to the meeting this afternoon if you have something important to do.A．needn’t to comeB．do
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• 在生态系统中，能量流动一般是从绿色植物固定太阳能开始的。[]-八年级生物
• Here _____some flowers.[ ]A.isB.areC.amD./-七年级英语
• That man ________ be Mary’s father, as he is much taller.A． canB．mustC． can’tD． mustn’t-八年级英语
• The teacher says we _____read ______ comic books.A．mustn’t, much tooB．can’t, much tooC．may not, too
• Her watch_____ in her backpack. [ ]A. am B. is C. are D. be -七年级英语
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• ----Listen! Is Kitty in the next room? ---- No, it ______ be Kitty. She has gone to Beijing.A．may no
• — you speak Chinese, Miss Green?— Yes, I can.A．MayB．CanC．MustD．Need-九年级英语
• （1）在这个生态系统中，有______条食物链，最长的一条食物链是______．（2）在这个食物网中，生产者是______，属于消费者的是______．（3）在这个生态系统中，鼠与蛇的关系是_____
• — _____ you find _______ ways to work out this problem, Jim? — Yes, I ______.A．Could; another; could
• Boys, you ______ be sitting in this room. It is for your teachers only.A．shouldn’tB．don’t have toC．w
• Wang Mei _____ her mother because she is beautiful and intelligent.[ ]A. lookB. likedC. is likeD. lo
• ---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the