4.People are overweight for many reasons,the most important one of which is that they eat the wrong foods,get the wrong types of calories per meal,and they also eat meals at the wrong time each day.Food is more powerful than any weight loss pill,because the food that you eat can either make you thin or fat.This is true because your body is like an engine,and it only needs certain foods at certain intervals(间隔)each day.
 Low-calorie Diets Do Not Work 
 The reason people cannot lose weight by starving themselves is that their metabolism(新陈代谢)will detect any major drop in calories and it will then adjust(调整)itself by burning fewer calories each day.That is the reason why you can eat 1,000 calories per day and not lose any weight,while your friends can eat 2,500 calories per day and not gain any weight.
 Low-fat Diets Do Not Work
   Many people in today's society are buying mostly low-fat or non-fat food at the grocery store.Everybody knows how much fat is inside the food they buy.However,people are getting fatter than ever before by doing this.They are not losing weight by changing to this low-fat lifestyle.
 Losing weight has nothing to do with these things.One of the most important things you can do to control your weight is to eat the proper foods,such as fruit and vegetables,eat them at the right time,and exercise every day.If people make this a habit,they will lose weight.
29.What is the main reason why people are overweight according to the author?A
 A.They eat the wrong foods at the wrong time.
 B.They eat food with lots of calories.
 C.They don't take any weight loss pills.
 D.They burn many calories every day.
30.The article is written in order toB.
 A.tell readers not to buy low-fat or non-fat food
 B.tell readers how to lose weight
 C.tell readers about an important scientific discovery
 D.call on people to lose weight and stay healthy
31.To realize the aim of your weight loss plan,you shouldD.
a.do exercise every day       b.eat meals at the right time
c.eat fruits and vegetables     d.eat low-fat or sweet food
e.eat the proper foods at each meal
A.a,b,c,d      
B.a,b,d,e       
C.a,c,d,e      
D.a,b,c,e.
2.Nothing could stop Dad.After he was put on disability for a bad back,he bought a small farm in the country,just enough to grow food for the family.He planted vegetables,fruit trees and even kept bees for honey.
And every week he cleaned Old Man McColgin's chicken house in exchange for manure(肥料).The Smell really burned the inside of your nose.When we complained about the terrible smell,Dad said the stronger the manure,the healthier the crops,and he was right.For example,just one of his cantaloupes(甜瓜)filled the entire house with its sweet smell,and the taste was even sweeter.
As the vegetables started coming in,Dad threw himself into cooking.One day,armed with a basket of vegetables,he announced he was going to make stew(炖菜).Dad pulled out a pressure cooker and filled it up with cabbages,eggplants,potatoes,corns,onions and carrots.For about half an hour,the pressure built and the vegetables cooked.Finally,Dad turned off the stove,the pot began to cool and the pressure relief valve sprayed out a cloud of steam.If we thought Dad's pile of chicken manure was bad,this was 10times worse.When Dad took off the lid,the smell nearly knocked us out.
Dad carried the pot out and we opened doors and windows to air out the house.Just how bad was it?The neighbors came out of their houses to see if we had a gas leak!
Determined,Dad filled our plates with steaming stew and passed them around.It didn't look that bad,and after the first wave had shut down my ability to smell,it didn't offend the nose so much,edible,and we drank up every last drop of soup.

8.What does"Nothing could stop Dad"probably indicate?D
A.Dad was stubborn and hot-tempered.
B.Dad was difficult to get along with.
C.Dad was hardworking and determined.
D.Dad was unwilling to give up anything.
9.Why did the neighbors come out of their houses?D
A.To see how delicious the stew was.
B.To have a taste of the stew.
C.To have a look at something interesting.
D.To see whether there was something wrong.
10.What does the underlined word"offend"in the last paragraph mean?B
A.To attract
B.To upset
C.To air
D.To shut
11.What can we infer about Dad's stew?A
A.It smelt bad first but was actually quite yummy.
B.It was unbearably unpleasant to both eyes and nose.
C.It should have won a prize in a cooking competition.
D.It entered a cooking competition,but failed to win a prize.

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