eventy percent of those earning at least $1 50，000 per year prefer smaller portions;but only 45 percent of those earning less than$25，000 want smaller.
it's not that working class americans don’t want to eat healthy.it's just that，after long hours at low—paying jobs，getting less on their plate hardly seems like a good deal.they live from paycheck(薪金支票)to paycheck，happy to save a little money for next year’s christmas presents.
36. parents in the united states tend to ask their children
a. to save food for tomorrow.
b. to wash the dishes
c. not to eat too much.
d. not to waste food.
37. why do american restaurants serve large portions?
a. because americans have big bellies.
b. because americans associate quantity with value。
c. because americans are good eaters.
d. because americans are too weak.
38. what happened in the 1970s?
a. the us government called on its people to reduce their weight.
b. health experts persuaded restaurants to serve smaller portions.
c. the american waistline started to expand.
d. the united states produced more grain than needed.
39. what does the survey indicate?
a. twenty percent of americans want smaller portions.
b. many low-income americans want large portions.
c. fifty--seven percent of americans want large portions.
d. forty--five percent of americans want smaller portions.
40. which of the following is not true 0f working class americans?
a. they work long hours.(www．。com)
b. they live from paycheck to paycheck.
c. they want to save money for presents.
d. they don’t want to be healthy eaters.
第三篇 u.s. life expectancy hits new high
life expectancy rates in the united states are at an all—time high，with people born in 2005 projected to live for nearly 78 years，a new federal study finds.
the finding reflects a continuing trend of increasing life expectancy that began in1955.when the average american lived to be 59.6 years old.by 1995，life expectancy was 75.8 years，and by 2005，it had risen to 77.9 years，according to the report released wednesday.
“this is good news，”said report co—author donna hoyert，a health scientist at the national center for health statistics.“it’s even better news that it is a continuation of trends，so it is a long period of continuing improvement.”
despite the upward trend，the united states still has a lower life expectancy than some 40 other countries，according to the u.s. census(人口普查)bureau.the country with the longest life expectancy is andorra at 83.5 years，followed by japan，macau，san marino and singapore.
much of the increase owes to declining death rates from the three leading causes of death in the country—heart disease.6an'cef arid stroke.
in addition，in 2005，the u.s.death rate dropped to an all—time low of less than 800 deaths per 1 00,000.
dr.david katz，director of the prevention research center at yale university school of medicin
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