—Must we finish our homework before dinner?—No, you _____.[ ]A. mustn'tB. mustC. needn'tD.

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• It is raining hard outside, so we _____ stay in the classroom. [ ]A. must B. can C. have to D. might
• 根据你所学的生物学知识判断下列说法正确的是（）A．“有收无收在于水，收多收少在于肥”，这句话表明了植物的生长需要水和有机物B．既能生活在水中又能生活在陆地上的动物都属于两-生物
• You_____ smoke when you see the sign.[ ]A. mustB. shouldC. mustn'tD. needn't-八年级英语
• You play computer games for a long time. It’s bad for your eyes.A．shouldB．shouldn’tC．couldD．don’t ha
• 在如右图所示的食物网中，要使E的产量最高，把能量集中引向E的食物链应是（）A．A→B→C→EB．A→B→EC．A→DD．A→B→C-生物
• —Do we have to finish our homework this afternoon? —Yes, you _______. [ ]A. must B. can C. may D. ne
• 句型转换。根据所给提示，完成句型转换。每空一词，含缩略词。 1. He can play the guitar. (改为一般疑问句,并作否定回答)________ he play the guitar
• —I can't get to sleep at night.—You ____drink coffee at night.[ ]A. shoulds B. shouldn'tC.
• 关于生产者、消费者、分解者的叙述，错误的是（）A．能将有机物分解为无机物的生物都叫分解者B．消费者的身体细胞表面一般都没有细胞壁C．在光下能放出氧的生物一般都是生产者D．生-生物
• 在草原生态系统的一些生物部分和非生物部分中，有阳光，草，水和无机盐、牛，细菌等．请根据以上说明回答．（1）在这个生态系统中，生产者是______，消费者是______．二者之间存在-生物
• Multiple choice. （5分）1. He mustn’t ________ a car _________.A drives, dangerously B drive, dangerous
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