8．discover vt.发现→discovery n．发现

　　9．reduce vt.减少→reduction n．减少

　　Ⅲ.语境填词(根据提示用适当的单词或短语填空)

　　1．Thanks to his struggle(努力) of decades(数十年), the increased output(产量) of the crops rid the world of(摆脱) hunger.

　　2．Seeing more goods exported(出口) and the foreign market expanding(扩大), he was satisfied(满意的)．

　　3．Organic(有机的) farming focuses_on(集中注意力于) the health of the food，reducing(减少) the pollution of the soil(土壤) and keeping products free_from_chemicals and pests(使……免受化学药品和害虫的伤害)．

　　4．His hard work led_to(导致) the discovery(发现) of underground minerals(矿物)．

　　5．I regret_commenting(后悔评价) on his work and I would_rather(宁愿) I hadn’t done that.

　　Ⅳ.语境记忆(背诵语段，记忆单元词汇)

　　People struggled against hunger for several decades，but to their regret，they still couldn’t increase the output of grain production.Therefore hunger was a disturbing problem then.

　　Ⅴ.课文原句背诵

　　1．If_so,_what did you do to grow them?

　　如果这样，你做什么来种植它们？

　　2．Crops such as peas or soybeans put important minerals back into the soil，making_it_ready_for_crops such as wheat or corn that need rich and fertile soil.

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