英语专业八级改错练习题及答案解析(103)

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　　Excessive calories from sugar can contribute to weight problems,
　　and sugar is also well known for its ability to promote teeth __1__
* w( Z2 W4 \6 Z. P　　decay.
) X+ e3 J" t' J9 q　　Too many calories from fat have also taken their toll from the __2__
3 X' s# @/ z) F+ T) e　　public's health. In 1988, the U.S surgeon general issued a report
& D4 F' Q% W7 o2 S7 Z0 d　　linking high level of fat intake to an increased risk for obesity.
/ a) M1 |7 G* N& i/ }; i0 ]: f　　Obesity is a risk factor for high bloody pressure, stroke, and __3__
　　diabetes. Research has also shown a relationship between high
　　levels of fat in the diet and cancer. In addiction, scientists
/ `+ f7 _9 Y1 d! P; f9 G; A　　have linked some types of fat to high blood cholesterol level,
$ T: C( }$ ?; p3 M; ^7 m　　which must lead to heart disease. Such reports have prompted __4__
　　health experts and nutritionists to recommend that adults and
　　children over age 2 not only watch their sugar intake but
& b" ^( K, N; s1 E+ M" o　　also to limit their fat intake to a maximum of 30% of their __5__
% G- }! x4 O- F6 H　　complete calories. This has encouraged many people to turn __6__
　　to products made with fat and sugar substitutes.
9 `' k9 y' x: J' @( X6 l" @　　Low-calorie sugar substitutes have been around for decades,
　　but the recent trend in eating "light" has created a boom in this
- S5 x" u! s" o, l1 ^1 s　　branch of food-technology research. Today, food chemists are
  x: T$ s+ ~& C& w4 J. y　　seeking for better substitutes by modifying existing foods, __7__
: Q2 B! g& R' [: g7 X. v$ X　　searching for new compounds in nature, and concoct entirely __8__
! G1 f3 Q4 Q$ D% L( b　　new substances. But the research process is complicated by our
0 x% @: X# {5 e$ a3 ~+ b　　incomplete understanding of how the human body interacts with
6 {/ H$ y0 h: x8 V　　the chemicals we eat.
1 G; v% T# H, g" g! }1 E  w　　For example, scientists do not already know exactly why some __9__
　　substances taste sweet. Other questions involve the safe and __10__
2 L/ t7 Y2 P/ t+ Y　　usefulness of artificial fats and sweeteners.
　　答案：
3 E/ t! e" W& S　　1.teeth--tooth
　　名词直接作前置修饰语的时候，应该用单数形式。
　　2.（toll）from--on
: S6 i) O0 g9 }3 C% h0 d　　take one's toll on somebody/ something 的意思是“使得……受损失、对……产生不良影响”，如The terrible weather took its toll on my health。恶劣的天气对我的健康产生（不良）影响。
+ ~7 [5 a  I, \1 s! n1 L　　3.bloody--blood
　　bloody和blood都可以作为定语修饰名词，但是bloody的意思是“血腥的”。
　　4.must--may/can
　　这里上下文并没有必然的联系，所以用must是不恰当的，应该用比较弱的推测语气。
2 V# _: V3 b4 d& D% }- j/ O　　5.to（limit）--/
　　but also和前面的not only 构成并列结构，所以动词应该是不带to的不定式。
　　6.complete--total
; R7 Y( q  C7 L' I0 N: P　　原文的意思是“摄入的卡路里的总量”，表示数量上的总数应该用total，complete侧重表示 程度，组成部分的完整性。
, J9 A; r* z- ~, [　　7.for--/
　　seek是及物动词，直接跟宾语，要和look for 区分开来。
　　8. concoct--concocting
4 u2 ~( Z" @6 ?& v5 z8 G　　动词concoct通过连词and和前面的modifying、searching并列，所以应该是-ing分词。
　　9.already--yet
　　这是一个否定句，所以应该用yet。
　　10.safe--safety
　　safe是形容词，它作为名词的意思是“保险箱”，所以应该改成safety