Bilingual education is controversial in the United States.【C1】______, a grow

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问题 Bilingual education is controversial in the United States.【C1】______, a growing body of research shows that【C2】______ speaking two languages comes with certain types of improved mental【C3】______. Being able to use two languages and never knowing which one to be used right now is good to the brain. The attentional executive system, crucial for all higher thought, seems to be【C4】______.
Executive functioning allows us to keep a goal in mind, take【C5】______to achieve that goal, and to ignore other information that might【C6】______ us from that goal. The question is; Would it be the case that bilinguals, by the【C7】______need for controlling the two languages, develop a more efficient executive functioning system? The results suggest that bilinguals【C8】______ have this positive collateral effect, which is even stronger when it goes to kids and older people. These are ages【C9】______executive functioning is worse.
Bilinguals do better at tests that require multitasking, including ones that【C10】______ driving and talking on a phone. And the longer people have spoken multiple languages, the greater the cognitive【C11】______. There are even benefits when languages were【C12】______ at later ages.
Certainly, bilingualism comes - with some【C13】______. Bilinguals have more " tip-of-the-tongue" problems. There are a couple of milliseconds before they can target. Bilingual children, also, have【C14】______a smaller vocabulary in each of their languages than monolingual children,【C15】______ they probably know more words altogether.
Still, all of these findings are【C16】______ abstract. It is difficult to take laboratory findings showing better executive functioning in bilinguals and demonstrate that they【C17】______ into better performance in the workplace or some other practical【C18】______. The only real-world application preliminarily demonstrated may be that multilingualism can【C19】______health benefits to Alzheimer’s patients. Bilinguals show【C20】______ of the disease up to four years later than monolinguals. [br] 【C4】

选项 A、altered
B、enhanced
C、reflected
D、depressed

答案 B

解析动词辨析题。句意为：对所有高级思维都十分关键的注意力执行系统似乎得到了增强。由前文可知，双语使用会改善一些大脑功能，因此应选择与“改善”意义相近的enhanced“增强”。depressed“抑制”表示负面含义，排除；altered“改变”和reflected“反映；表现”也不能说明使用双语的优势。

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