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根据汉语提示填入以字母b开头的单词的适当形式，然后背诵微情景，熟记以b开头的课标词汇。 【初级词汇情景】 Though the two brothers majored in __1__ (生物学)，biochemistry and botany in Britain，they are interested in building broad and brilliant bridges with bricks and stones，thinking to make a breakthrough in the field.They came back to China，making Beijing the __2__ (基础) for their work.To be __3__ (简洁的)，I admire them very much. 尽管这兄弟俩在英国主修生物学、生物化学及植物学，但是他们对于用砖石建造宽阔而豪华的桥梁感兴趣，想在此领域做出突破。他们回到中国，把北京作为他们的工作根据地。简言之，我很钦佩他们。 自我校对 1.biology 2.base 3.brief 【高级词汇情景】 Having taken a deep __1__ (呼吸)，the brave bridegroom began to throw brown brochures from his baggage on a balcony，when the brochures like butterflies got to the bottom of the building.To people's surprise，a great businessman was busy __2__ (打扫)them with a broom，and he said he would lighten the __3__ (担子) of some people to __4__ (埋葬) or burn them.In fact，they were making an advertisement. 深吸了一口气，这位勇敢的新郎在阳台上开始从行李包里拿出一叠手册抛洒开去，手册像蝴蝶般飞舞着落到地面上。使人们惊奇的是，一位著名的商人在忙着用扫帚扫着，他说他要减轻别人的负担，把这些垃圾埋掉或烧掉，事实上他们这些人是在做广告。 自我校对 1.breath 2.sweeping 3.burden 4.bury | 
