You are too busy, so you keep any pets. [ ]A. ought toB. ought not toC. could D. should -八年级英语

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• —Look! The man standing there is Mr Green.— It ______ be Mr Green. He has gone to England. [ ]A．can&
• Look out! The knife is very sharp. You _____ cut your finger. [ ]A. must B. need C. should D. may -八
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• 请据图回答下列问题：（1）对吸入气体有过滤，湿润和温暖作用的结构是图一中的[______]______．（2）图二中的b代表的物质是______，血液从毛细血管[4]______端流到[5]_____
• —Tom, where is your father? — I'm not sure. He ______ in his office. [ ]A. is B. may be C. mayb
• — Listen! There is a strange noise over there. — There _____ some dangerous animals. Let's run
• Though it's cloudy now, it ______ get sunny later.[ ]A. can B. mayC. mustD. need -九年级英语
• 句型转换。1. May I smoke here? (否定回答)No, . 2. Look! There is some milk in the glass. (改为否定句)Look! There m
• 如图是人体呼吸系统结构图（1）在横线上填出各部位名称．1．______2．______3．______4．______5．______（2）人体的呼吸系统由______和______两部分构成，其中能
• The book be Lucy's because her name is on the cover. [ ]A. must B. can C. need D. does -九年级英语
• — Can you go swimming with us this afternoon?— Sorry, I can't. I ______ take care of my little
• —Must I go and repair our TV set this afternoon?—No, you _______. I've repaired it.[ ]A. mustn&
• 呼吸系统由呼吸道和______组成，后者是呼吸系统的主要器官，它是______的场所，呼吸道的作用是将吸入的空气变得______、______、______，减少对器官的刺激．-七年级生物
• — Daddy, I can see only a few stars in the sky. — Oh, my son. Many of stars ____ because they are to
• — It's the classroom! So you ______ know smoking is not allowed here.— Oh, sorry. [ ]A. need B.
• — Must I take my umbrella?— No, you ______. It's not going to rain. [ ]A. mustn't B. needn
• 呼吸系统的起始器官是（）A．鼻B．咽C．口腔D．喉-生物
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• 血液经过肺循环后，其变化是（）A．由动脉血变成静脉血B．由含养料变成含废物C．由静脉血变成动脉血D．由含废物变成含养料-九年级生物
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• If I went to the moon, I ______ bring something unusual back to the earth. [ ]A. can B. will C. woul
• He has bought a new car. It _______ be very expensive. [ ]A. can B. can't C. must D. mustn'
• You_______ to the meeting this afternoon if you have something important to do. [ ]A. needn't t
• —_______ you pass me a pen? I'd like to write down the phone number.—Sure. Here it is. [ ]A. Ca
• 连线题：骨骼神经系统肺运动系统心脏呼吸系统大脑循环．-生物
• The news be true. I know everything about it. [ ]A. can'tB. mustn'tC. needn't D. may
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• I think students _______ to do homework with friends.[ ]A. should allowB. should be allowedC. were a
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• A．人体的呼吸系统是由______和______两部分组成的．B．血液循环的动力器官是______．人体的体循环从心脏的______出发，最后流回心脏的______；肺循环从心脏的______出发，最
• 如图是人体呼吸系统模式图，请回答问题：（1）填出图中部分序号所指结构的名称：①______③______⑤______⑥______（2）当外界气体进入①时，可以变得清洁、湿润而温暖．与这一功能相适应
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• The man _____ walk fast because he is lame in the right foot. [ ]A. mustB. mustn'tC. canD. can&
• 人体的呼吸系统是由______和______组成的，呼吸系统的主要器官是______．-生物