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,
' D# w2 x9 l, |) {, w# w: r　　and sugar is also well known for its ability to promote teeth __1__
( u9 G+ V% ~5 M( p% J3 L　　decay.
　　Too many calories from fat have also taken their toll from the __2__
, X! f6 I, @& x7 i) B　　public's health. In 1988, the U.S surgeon general issued a report
  `+ y6 D% B! b* Y  [/ Q　　linking high level of fat intake to an increased risk for obesity.
+ w: \1 ^3 }* c; W5 l1 `' O　　Obesity is a risk factor for high bloody pressure, stroke, and __3__
$ X9 _" U7 T2 `4 F2 O* [& }4 C) P　　diabetes. Research has also shown a relationship between high
4 L. N6 s$ t4 f　　levels of fat in the diet and cancer. In addiction, scientists
( Z1 `! Y5 |7 Q0 d$ X0 E　　have linked some types of fat to high blood cholesterol level,
　　which must lead to heart disease. Such reports have prompted __4__
$ Y; n! a" P) l! U/ f　　health experts and nutritionists to recommend that adults and
　　children over age 2 not only watch their sugar intake but
　　also to limit their fat intake to a maximum of 30% of their __5__
　　complete calories. This has encouraged many people to turn __6__
  q8 a  s$ }. C' m: J; I　　to products made with fat and sugar substitutes.
0 O2 G+ `  X0 L. q　　Low-calorie sugar substitutes have been around for decades,
　　but the recent trend in eating "light" has created a boom in this
& ?$ V! h. a0 F$ d; P  u　　branch of food-technology research. Today, food chemists are
$ ?& c# i% ?' h" g; s　　seeking for better substitutes by modifying existing foods, __7__
; K1 P: ~9 \7 g* J/ R　　searching for new compounds in nature, and concoct entirely __8__
　　new substances. But the research process is complicated by our
) v+ P0 F+ s8 h5 g- O　　incomplete understanding of how the human body interacts with
3 y; s, U$ d% h$ ~, Q  [. r0 S　　the chemicals we eat.
　　For example, scientists do not already know exactly why some __9__
' o" n4 {. Z$ A) u" g　　substances taste sweet. Other questions involve the safe and __10__
　　usefulness of artificial fats and sweeteners.
　　答案：
　　1.teeth--tooth
　　名词直接作前置修饰语的时候，应该用单数形式。
/ T: U. m- P7 X1 J　　2.（toll）from--on
, {  M$ O+ o) m# S　　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。
; G/ X, e& Q# A- f$ e. I　　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
: G2 j* P' G/ ^8 Y) ?& U7 T　　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。
5 x, d% o# p1 b! R1 Z9 `　　5.to（limit）--/
/ O: x7 b0 J7 c1 o& ?5 T4 @, K% [# _　　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
　　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。
2 {6 p  j& s; p3 b# E, q　　7.for--/
　　seek是及物动词，直接跟宾语，要和look for 区分开来。
　　8. concoct--concocting
1 M4 N1 S2 a) f* k% \　　动词concoct通过连词and和前面的modifying、searching并列，所以应该是-ing分词。
) J3 ^1 S0 m1 a- e+ f2 C　　9.already--yet
　　这是一个否定句，所以应该用yet。
　　10.safe--safety
' [4 y5 v6 W* e　　safe是形容词，它作为名词的意思是“保险箱”，所以应该改成safety