You stand in line while waiting for the bus.A．mustn’tB．can’tC．are supposed toD．don’t-九年级英语

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• 一 ______ Mimi cute? 一 Yes, I think so. [ ]A. Doesn't B. Don't C. Aren't D. Isn't
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• 池塘生态系统中有鱼类、浮游动物、绿色水生植物、真菌等生物，则该生态系统中的物质和能量的流动是从哪类生物开始的（）A．绿色水生植物B．浮游动物C．鱼类D．真菌-生物
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• —Mr. Wang __________ be in the office. The light is still on.—No, he __________ be. Because he phone
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• --Who is making much noise?---It ____ be Timmy. He is sleeping now.A．can’t B．may notC．mustn’t D．coul
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