Memory begins to diminish in Asome people as early as Btheir forties, but Cthis does not mean Dhe will develop Alzheimer’s disea

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问题 Memory begins to diminish in Asome people as early as Btheir forties, but Cthis does not mean Dhe will develop Alzheimer’s disease.

选项 A、 
B、 
C、 
D、 

答案D

解析 He does not agree in number with people, the noun it refers to. Correction: they.
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