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] 【C19】

选项 A、promise
B、predict
C、provide
D、prove

答案 C

解析动词辨析题。句意为：唯一在现实应用中初步得到证实的可能就是，多语使用对老年痴呆症患者有益。此处文章是在讨论双语使用的现实益处，而不是讨论其未来的可能，因此首先排除promise“承诺”和predict“预测”；这里是阐述实验研究以外的现实情况，因此prove“证实”不合上下文语境，也应排除。provide“提供，带来”符合原文语义，并可与介词to搭配，故为答案。

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