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课时作业(五) [必修1 Module 5 A Lesson in a Lab] [限时：35分钟] Ⅰ.单项填空 1．You ________ this， Mother. It's no concern of yours. A．keep to B．keep out of C．keep off D．keep up 2．—Do you mind if I smoke？ —________ A．Why not？ B．Yes， help yourself. C．Go ahead. D．Yes， but you'd better not. 3．We all sat with plates ________ on our knees. A．to be balanced B．balanced C．balancing D．to balance 4．When the temperature drops to 0℃， ice ________ on the surface of water. A．has B．floats C．forms D．produces 5．In my view， London’s not as expensive in price as Tokyo， but Tokyo is ________ in traffic. A．the most organized B．more organized C．so organized as D．as organized as 6．They are such people that they will________to get exactly what they want whatever the cost is. | 
