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  3. Eating fruits and vegetables has proved helpful in preventing various chronic(慢性的)illnesses. Does that mean the more the better?

Eating fruits and vegetables has proved helpful in preventing various chronic(慢性的)illnesses. Does that mean the more the better?

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问题     Eating fruits and vegetables has proved helpful in preventing various chronic(慢性的)illnesses. Does that mean the more the better?
    The data from 16 studies were analyzed,【C1】______more than 833,234 adults. The span of the studies【C2】______from 5 to 26 years. 56,423 adults participating in the studies died. Overall, the more fruits and vegetables people【C3】______, the less likely they were to have died during the study period. For every【C4】______serving eaten, up to four a day, the chance of dying for any reason decreased by 5 percent. Those who ate four servings a day were 24 percent less【C5】______to have died than those who ate none at all. However, eating five or more daily servings indicated no added【C6】______. Higher consumption of fruits and vegetables also showed【C7】______no effect on the probability of dying from cancer.
    Although the recommendation of the【C8】______serving varies with age, health status and other factors, most adults are called for to fill half their plate with fruits and vegetables. The food pyramid(金字塔)model【C9】______that adults eat three to five servings of vegetables and two to four servings of fruits daily.
    However, the study did not determine whether certain fruits or vegetables were more or less beneficial than others. It indeed inferred that there’s a(n)【C10】______to how much fruit and vegetables are good for you.
A)additional
B)annual
C)benefit
D)boundary
E)consumed
F)daily
G)essentially
H)financially
I)investing
J)involving
K)likely
L)limit
M)probable
N)ranged
O)suggested
【C5】
选项
答案K
解析 空格位于副词less和动词不定式to have died之间，且位于系动词were之后，句子缺少表语成分，故应填入形容词作表语。根据句意可知，每天吃四份水果和蔬菜的人比每天根本不吃水果和蔬菜的人相比，死亡的可能性要低24％，故空格处填入likely“可能的”，其在本句的用法为sb．be likely to dosth．。备选的形容词中，probable也意为“可能的”，但它并无此用法，其用法通常是it is probable for sb．todo sth．，故排除。
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