A decade-long study suggests that combining multiple healthy lifestyle choices — the more the better — ___1___ (be) linked with reducing the speed of memory decline as people age.

Researchers analysed 29, 000 adults aged over 60 with normal cognitive (认知的) function ___2___ were part of the China Cognition and Aging Study. At the start of the study in 2009, memory function was measured ___3___ (use) tests and people were checked for the APOE gene,    which is the ___4___ (strong) risk-factor gene for Alzheimer’s disease. The subjects were then monitored for 10 years with regular ___5___ (assess). A healthy lifestyle score combining six factors ___6___ (calculate): a healthy diet, regular exercise, active social contact, cognitive activity, non-smoking, and not drinking alcohol. 

Findings showed that a healthy diet had the strongest effect ___7___ slowing memory decline, ___8___ (follow) by cognitive activity and then physical exercise. People with the APOE gene who had healthy lives on the whole also experienced a ___9___ (slow) rate of memory decline than those with APOE who were the least healthy.

Dr Susan Mitchell said: “This is a well-conducted study, which followed people over a long period of time, and adds to the great evidence ___10___ a healthy lifestyle can help to support memory and thinking skills as we age. ”

1.1.

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解析：选is。is 考查主谓一致。分析句子结构可知，前面的that从句中，主语是动名词短语combining multiple healthy lifestyle choices，谓语动词是be动词，用单数形式。故填is。

2.2.

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解析：选who。who 考查定语从句。句意：研究人员分析了2.9万名60岁以上认知功能正常的成年人，这些人参与了中国认知与老龄化研究。分析句子并结合句意可知，此题空引导定语从句，修饰先行词adults。故填who。

3.3.

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解析：选using。using 考查非谓语。分析句子结构可知，句子主干部分是memory function was measured，题空处用现在分词结构作方式状语，用现在分词形式。故填using。

4.4.

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解析：选strongest。strongest 考查形容词最高级。根据题空前的定冠词the可知，此处用形容词的最高级形式。故填strongest。

5.5.

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解析：选assessments。assessments 考查名词。句意：然后对受试者进行了为期10年的定期（多次）评估监测。此处需填名词构成介词短语，assessment是可数名词，用复数形式。故填assessments。

6.6.

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解析：选was calculated。was calculated 考查被动语态。句意：综合了六个因素的健康生活方式评分被计算出来…… 主语score与动词calculate是被动关系，用被动语态；结合前文中的were checked以及were then monitored可知，用一般过去时。故填 was calculated。

7.7.

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解析：选on。on 考查介词。have an effect on...表示“对……有影响”。故填on。

8.8.

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解析：选followed。followed 考查非谓语。句意：研究结果表明，健康饮食对减缓记忆力衰退的效果最强，其次是认知活动，然后是体育锻炼。分析句子结构可知，本句已有谓语had，因此follow应用非谓语形式；followed by...作伴随状语。故填followed。

9.9.

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解析：选slower。slower 考查形容词比较级。根据后面的than可知，此处用比较级形式。故填slower。

10.10.

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解析：选that。that 考查同位语从句。句意：这是一项进行得很好的研究，它对人们进行了很长一段时间的跟踪调查，并为健康的生活方式有助于提高我们的记忆力和思维能力提供了有力的证据。分析句子结构可知，题空后是一个完整的句子作evidence的同位语，因此用that引导同位语从句。故填that。