— Can we leave the classroom now?— No, you ______. You ______ to leave until the bell rings.A．mustn

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• 自然界中的生态系统都能在较长时间内保持相对稳定，其主要原因是[]A．具有复杂的食物链结构B．消费者种类和数量多C．生产者的种类和数量多D．生态系统具有一定的自我调节能力-八年级生物
• 下图是某生态系统食物网的一部分图解。请据图回答：（1）该示意图表示的只是某一食物网，若要表示一个生态系统，还有_________和________________两个部分未画出。（2）此食物网中-八年
• —Whose workbook is this, Tony?—Look! Ann's name is on it! It ______ be hers.A．can'tB．mustC
• ---Look at the glasses on the desk. Are they David’s?---They belong to him. I saw him go out with gl
• 阅读有关凯巴森林的资料，分析并讨论这个生态系统稳定性被破坏的原因。在1906年以前的凯巴森林中，每当黑尾鹿的数量增加，就需要森林提供更多的食物，从而造成森林中的植被减-八年级生物
• ---Lucy doesn’t mind lending you her dictionary.---I think she doesn’t, but I ________do so. I’ve al
• ---Look at that girl! Is that Susan?---No , it _______ be her. She has gone back to her hometown.A．m
• You ___ cross the road when the traffic lights are red. It’s dangerous. A. needn’tB. may not C. must
• —Let’s go to Zhongshan Park by taxi.—It’s not far. We _________ take a taxi.A. needn’t B. can’t C. m
• Teenagers _______ allowed to drive in the street．A．should not beB．should be notC．not should beD．shou
• —Why is online shopping getting more popular? —I think it _________ save a lot of time.A．shouldB．had
• It is usually warm in Nanjing in spring. But sometimes it be very cold.A．mustB．wouldC．canD．should-八年
• It’s said that there are plenty of hotels in that town. There ____________ be any difficulty for you
• —Look at the boy running on the ground. Is it Davis?—It ______ be him. I saw him go to the teacher’s
• 生态平衡是一种动态和相对的平衡。[]-八年级生物
• ---Could I go boating this weekend, Dad?---Yes, you ________. But you ________ come back before lunc
• —____ I swim here?—I’m sorry. Children ____ swim alone here..A．Must, can’tB．May, mustC．Can, mustn’tD
• 生态平衡意味着生态系统中各种生物的数量是恒定不变的。[]-八年级生物
• With the help of the smart phones, you ____ video chat with your friends on the phone.A．canB．mustC．n
• —Honey, stay at home before I return.—I, mum.A. must B. can C. will-七年级英语
• —May I use your computer, Mr WU?—______．A．Yes, you may notB．No, you mayC．Yes I mayD．No, you may not-
• —Whose shirt is this?—It ______ be Li Lei’s. It is too big for him.A．couldB．mustC．mightD．can’t-八年级英语
• If you know nothing about the famous program called Where are we going, dad?, you ______be living in
• —Can you play the violin? —_____. But I can sing.A．Yes, I doB．No, I don’tC．Yes, I canD．No, I can’t.
• Look, Grace just takes after the man. I think he be her father.A. must B. can C. can’t -八年级英语
• — The Queshi greenway has become a popular place for Shantou people on the weekends. — That’s right.
• —May I take photos in the museum? —No, you . You obey the rules here.A．may not; canB．mustn’t; mayC．c
• ----Must I leave now?----No, you _________. There is still some time left.A. mustn’tB. needn’t toC.
• —Shall I help you prepare for the dinner?—No, you ________. Everything has been ready.A. can’t B. m
• ---Someone is knocking at the door. Is it your brother?---No, it be him. He’s gone to Hunan.A．mustn’
• —Listen! Is Mary singing in the next room?—No. It _______ be Mary．She has gone to Shanghai for an im
• ---Must I finish my homework now ? ---No, you ________A．shouldn’tB．mustn’tC．needn’tD．can’t-八年级英语
• —You praise your son. He works harder than before. —Thanks, I will.A．should B．canC．mayD．must-九年级英语
• 请根据中英文提示或句意，写出句中所缺单词，使句子通顺。(5分）小题1:My parents love sports, e_________ walking and jogging.小题2:There
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• — I’m a little tired. Let’s go to the zoo by taxi.—We ________take a taxi. It’s not far from here.A．
• --Whose T-shirt is this? --It ____ be John’s. It’s ______ small for him. A．can ’t; much tooB．can ’t;
• You _________ drive so fast, for we have enough time to arrive at the station.A．can'tB．mustn�
• --Writing is a skill, it looks easy but itbe difficult.--No wonder I'm not so good at writing.
• –Can you swim? --___________, but my brother Tom can. A．Yes, I can.B．No, I can’t.C．Yes, I do.D．No, I
• ---Let's go to the train station by bus.---We______take a bus. It is quite near from here.A．ca
• -- Can you play the piano?-- ____________________________.A．Yes, a littleB．Sure, I can’tC．No, you ca
• –Do we have to talk with Jack about that matter?–Yes, I think we __________.A．canB．mayC．shouldD．coul
• —Boy, you _______ lean (伸) out of the window while the bus is running. That’s dangerous.—Sorry, I w
• — John, do you have any plans for this weekend?— I’m not sure. I _______ go fishing with my uncle.A．
• —Must I take medicine every day?—No, you .A．must B．mustn’t C．needn’t-八年级英语
• To make our city more beautiful, rubbish _________ into the river.A．needn’t be thrownB．can’t thrown
• ---Must I finish doing my homework now, Mum?---No, you ________.A．can’tB．may notC．mustn’tD．needn’t-七