3.What happened（發(fā)生） in the 1970s?
A)The US government（政府） recommended（推薦） the amount（數(shù)量） of food a restaurant（餐館） gave（給） to a customer（顧客）．
B)Health experts（健康專家） persuaded（勸說， 說服） restaurants to serve（供應） smaller portions．
C)The United States （美國）produced（生產，結(果實), 引起） more grain（糧食） than （it is） needed（被需要的）．
D)The American waistline(腰圍) started to （開始）expand（膨脹， 擴大）．
3．D．問題問“二十世紀七十年代發(fā)生了什么？”利用問題句中的特征詞1970s作為答案線索，在文章第3段中找到答案相關句 “Clean your plate and!” “Be a member of the clean-plate club!” Just about every kid in the US has heard this from a parent or grandparent．often，its accompanied by an appeal：“Just think about those Starving orphans in Africa!”Sare，we should be grateful for every bite of food． Unfortunately, many people in the US take too many bites3.Instead of staying “clean the plate”， perhaps we should save some food for tomorrow．
According to news reports，US restaurants are partly to blame for the growing bellies．A waiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government，according to a USA Today story4.（第2題答案相關句）Americans traditionally associate quantity with value and most restaurants try to give them that．They prefer to have customers complain about too much food rather than too little．
Barbara Rolls，a nutrition（營養(yǎng)學） professor（教授） at Pennsylvania State University（賓夕法尼亞州大學）, told USA Today that restaurant portion sizes（尺寸， 大?。?began to （開始）grow（增長， 增加） in the 1970s，the same time that the American waistline （選項D中的細節(jié)信息詞）began to expand（擴大）.
答案相關句說“一位濱洲大學營養(yǎng)學教授Barbara Rolls告訴《今日美國》二十世紀七十年代飯館給的飯菜量開始增加，與此同時，美國人的腰圍也開始增大”， 因此選項Ｄ正確。
A)The US government（政府） recommended（推薦） the amount（數(shù)量） of food a restaurant（餐館） gave（給） to a customer（顧客）．
B)Health experts（健康專家） persuaded（勸說， 說服） restaurants to serve（供應） smaller portions．
C)The United States （美國）produced（生產，結(果實), 引起） more grain（糧食） than （it is） needed（被需要的）．
D)The American waistline(腰圍) started to （開始）expand（膨脹， 擴大）．
3．D．問題問“二十世紀七十年代發(fā)生了什么？”利用問題句中的特征詞1970s作為答案線索，在文章第3段中找到答案相關句 “Clean your plate and!” “Be a member of the clean-plate club!” Just about every kid in the US has heard this from a parent or grandparent．often，its accompanied by an appeal：“Just think about those Starving orphans in Africa!”Sare，we should be grateful for every bite of food． Unfortunately, many people in the US take too many bites3.Instead of staying “clean the plate”， perhaps we should save some food for tomorrow．
According to news reports，US restaurants are partly to blame for the growing bellies．A waiter puts a plate of food in front of each customer, with two to four times the amount recommended by the government，according to a USA Today story4.（第2題答案相關句）Americans traditionally associate quantity with value and most restaurants try to give them that．They prefer to have customers complain about too much food rather than too little．
Barbara Rolls，a nutrition（營養(yǎng)學） professor（教授） at Pennsylvania State University（賓夕法尼亞州大學）, told USA Today that restaurant portion sizes（尺寸， 大?。?began to （開始）grow（增長， 增加） in the 1970s，the same time that the American waistline （選項D中的細節(jié)信息詞）began to expand（擴大）.
答案相關句說“一位濱洲大學營養(yǎng)學教授Barbara Rolls告訴《今日美國》二十世紀七十年代飯館給的飯菜量開始增加，與此同時，美國人的腰圍也開始增大”， 因此選項Ｄ正確。