(2016·广西桂林、崇左市高三4月联考)Our modern life is changing our eating habits.We are spending too much time in front of TV or computers and __1__(become) “couch potatoes” or “mouse potatoes”．We also eat too much junk food and we don’t get enough exercise.The foods we find in the supermarket are sometimes no  __2__(benefit) to us，and it is difficult to know exactly __3__   we are eating when we buy ready－made or pre－prepared dishes.Considering this situation，it is becoming __4__(much) important than ever  __5__(make) sure that we keep a healthy diet.

A healthy diet gives us the calories we need and don’t contain too much fat.The number of calories we need   __6__(change) depending on what kind of body we have (are we short，tall，heavy etc.)and how active we are.Quality food，or healthy food，gives us calories in the best way.Junk food，__7__  the other hand，gives us few calories and lots of fat and sugar.If we eat too much fat and sugar，we will put on  __8__(weigh) easily，in order to live  __9__   happy and long life，we should keep a __10__(balance) diet.

【语篇导读】　本文是一篇说明文。不良的饮食习惯给人们带来了很多危害，因此作者呼吁大家要养成健康的饮食习惯。

1．becoming　[考查动词的用法。与前面的“are spending”构成并列谓语，故用－ing形式。]

2．beneficial　[考查固定搭配的用法。谓语动词为系动词be，故用形容词作表语。“be no beneficial to”意思是“对……无益”。]

3．what　[考查关系词的用法。句意：当我们购买了现成的或提前准备好的食物时，我们很难清楚地知道我们吃的到底是什么。know后面的宾语从句中缺少宾语，故填what。]

4．more　[考查比较级的用法。根据后面的than这个词，可知要用形容词的比较级。]

5．to make　[考查不定式的用法。由语境可知此处意为“为确保……”，应当用不定式作目的状语。]

6．changes　[考查动词时态的用法。the number of 意思是“……的数目”。“The number of＋复数名词”作主语时，谓语动词用单数。]

7．on　[考查固定搭配的用法。on the other hand 为固定搭配，意思是“另一方面”。]

8．weight　[考查名词的用法。put on后面缺少宾语，应当变成名词。“put on weight”是“增肥”的意思。]

9．a　[考查冠词的用法。live a happy life“过着幸福的生活”，这是固定词组。]

10．balanced　[考查形容词的用法。修饰名词diet要用形容词，balanced意思是“均衡的”。]