2. 外语
  3. 　　As people age, the brain changes in both good ways and bad. 　　If you are over 20, your cognitive performance is probably alrea

　　As people age, the brain changes in both good ways and bad. 　　If you are over 20, your cognitive performance is probably alrea

admin2021-11-25  71
问题 　　As people age, the brain changes in both good ways and bad.
　　If you are over 20, your cognitive performance is probably already
on the wane. The speed over which people can process information【S1】____________
declines at a steady rate from as early as their 20s.
　　A common test of processing speed is the "digit symbol substitution
test", in that a range of symbols are paired with a set of numbers in a【S2】____________
code. Participants are shown the code, given a row of symbols, then【S3】____________
asked to write down the corresponding number in the box below within
a set period. There is nothing cognitively challenging about the task;
levels of education do no difference to performance. But age does.【S4】____________
Speed consistently declines as people get older.
　　Fortunately, there is some good news to go with the bad.
Psychologists  distinguish "fluid intelligence", which is the ability【S5】____________
to solve new problems, and "crystallized intelligence", which roughly
equates to an individual’s stock of accumulating knowledge. 【S6】____________
　　These reserves of knowledge continue to increase with age:
people’s performance on vocabulary and general-knowledge tests
keeps improving into their 70s. Yet experience can often 【S7】____________
compensate for cognitive decline. In an old but instructive study
of typists ranging in the age from 19 to 72, older workers typed【S8】____________
just as fast as young ones, even though their   tapping   speed   was【S9】____________
slower. They achieved this   by looking further ahead in the text,
which allowed them to keep going smoothly.【S10】____________
【S10】
选项
答案^smoothly→more
解析 比较级缺失。前一句指出尽管年长的打字员敲键盘的速度较慢，但他们的打字速度和年轻打字员一样快。紧接着解释了原因：年长的打字员打字时会更多地预览文本，这使他们打字更顺利。由looking further ahead可知，副词smoothly应使用比较级，故应在smoothly前加上more。
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