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【课标要求】Unit 4 高考知识点 【复习任务】 1学习重点atmosphere。Pull。puzzle cheer。in time .break out .watch out 2学习难点 more than. now that . come on 【问题导学】 (单元重点词汇）请根据语义及提示写出单词 1 “What happened？” John’s mother asked him in a________(温和的) voice.. 2. Before the Earth’s protective__(大气层) was formed，there was no life except in the sea. 3. With the________(引力) of the moon and the sun each day，tides (潮汐) roll in and roll away. 4．Smoking________(乘，增加) the risk of heart attacks and other health problems. 5．Eating too many desserts can be________(有害的) to one’s teeth. 6．Global warming and__(气候) change problems are perhaps the greatest threats to our planet. 7．According to the________(理论) of relativity (相对论)，nothing can travel faster than light. 8．Most of the evidence had been destroyed.________(因此，于是)，it was almost impossible to prove him guilty. 9. Health __________(依赖于) upon good food, fresh air and enough sleep. （单元重点短语）请根据语义写出短语 ____system 太阳系 2. ___time 及时，最终3. ____ birth to 生(孩子) | 
