6．Using the computer isn't difficult once you ________ it. 7．________ you are grown up, you should not rely on your parents. 8．Should another world war ________， what would become of human beings? 9．The crowd ________ when they saw the teams arrive. 10．I'll go with you ________ the station for company. 答案 1．in time　2.giving birth to　3.in its turn 4．blocks out　5.watch out　6.get the hang of 7．Now that　8.break out　9.cheered up 10．as far as Ⅲ.单词拼写 1．It cost him more than one ________ (十亿) dollars to complete the project. 2．“What happened？”John's mother asked him in a ________ (温和的) voice. 3．Before the Earth's protective ________ (大气层) was formed, there was no life except in the sea. 4．With the________ (引力) of the moon and the sun each day, tides (潮汐)roll in and roll away. 5．Man­made ________ (卫星) are used for sending and receiving messages. 6．Smoking ________ (增加) the risk of heart attacks and other health problems. 7．Eating too many desserts can be ________ (有害的) to one's teeth. 8．Global warming and ________ (气候) change problems are perhaps the greatest threats to our planet. spread out 散开；伸展；延伸 spread over 遍布在 spread (from...) to (从……)传到，波及到 spread oneself 舒展四肢(躺下) 即境活用5　Paper－making began in China and from there it ________ to North Africa and Europe. A．exported

　　B．spoiled C．carried

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