单项选择题

According to the passage, which of the following causes Alzheimer’s disease

A．Sever emotional stress.
B．Nutritional deficiency.
C．The death of nerve ceils in the cerebral cortex.
D．Severe head trauma.
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In The major debilitating symptoms of Alzheimer’s disease include serous forgetfulness- particularly about recent events-- and confusion. , debilitating means______.
A．deceasing
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C．serious
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After ______for the job, you will be required to take a language test.
A．being interviewed
B．interviewed
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