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18.Colorful fruits and vegetables are helpful to our health.Their(61)natural(nature)colors help protect our bodies from disease.Think about the colors of fruits and vegetables---the red of tomatoes,the orange of carrots,the green of apples and the purple of grapes.
You can enjoy(62)eating(eat) fruits and vegetables of all colors---green,yellow,blue,purple,and white.Each color(63)is(be) important to our health.These colors work together to protect(64)our(we) bodies.Scientists have studied them and discovered(65)thegood of colorful fruits and vegetables.The list below shows some benefits of some colors in fruits and vegetables:
Red gives us a healthy heart.It can(66)possibly(possible) reduce heart disease.Red helps improve our memory.
Yellow is good(67)forour eyes.
White can reduce cholesterol(胆固醇).
Green is helpful to eyes.It also gives us strong bones and(68)teeth(tooth).
Blue helps us keep a good memory as we grow old.It also helps fight heart disease.
So,(69)when/while/if you are buying or eating fruits and vegetables,remember(70)to try(try)different colors of them.

分析 本文属于说明文,介绍了各种不同颜色的水果和蔬菜的益处.水果和蔬菜的自然的颜色有助于保护我们的身体不受疾病的侵袭.这些颜色一起发挥作用来保护我们的身体.红颜色可以给我们一颗健康的心脏.它可以降低患心脏病的几率.绿色对眼睛有益.它也可以给我们以强壮的骨骼和坚硬的牙齿.所以在日常饮食中,我们应该尽可能多的选择不同颜色的食物和蔬菜.

解答 61.natural;考查形容词用法.此处用形容词形式在名词colors前作定语.
62.eating;考查固定搭配.enjoy doing sth是固定用法,意为"喜欢做某事".
63.is;考查主谓一致,句子的主语Each color为单数形式,故谓语动词也要用单数形式,这里用is与后面的important构成系表结构.
64.our;考查物主代词.本句中we是主格,在句中做主语,而在名词前要用形容词性物主代词做定语.所以本句中使用our修饰名词bodies.
65.the;考查定冠词.本句中形容词good和定冠词the连用指一类事物,同时表示特指,而且the good的后面还有介词短语of colorful fruits and vegetables修饰,所以用the表示特指.
66.possibly;考查副词.本句中使用副词possibly做状语修饰动词reduce.
67.for;考查介词固定搭配.固定短语be good for意为"对…有益健康的"..
68.teeth;考查名词复数形式.因tooth是可数名词,且要与and前面的bones并列,故用复数形式..
69.when/while/if;考查句式结构关系,结合上下文分析,本句可理解为"如果/当你卖蔬菜水果的时候…",所以此处可以用if引导一个条件状语从句,或用when/while引导一个时间状语从句.
70.to try;考查固定结构.动词短语remember to do记住要做…,表示去做未做的事情.而remember doing sth.记得做过某事,使用动名词doing表示已经做过的事情.

点评 首先要通读全文,了解大意,抓住上下文语境所提供的信息,仔细分析带空格的句子,明确空格所要填的词义,词型和短语搭配,给出所要填的正确形式,然后整体阅读短文,核对答案.

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