单项选择题

Vitamin E is

A．very popular among some people.
B．effective in memory enhancement.
C．very helpful to the elderly actions.
D．destructive in aging and cancers.
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单项选择题
When researchers conducted a three-year study involving nearly 3,000 people older than 65, what should these people do first
A．They should fill up a dietary form regularly.
B．They should enable the researchers to evaluate.
C．They should compare different effects of Vitamin E．
D．They should take a regular diet as advise
单项选择题
Jack can never get high marks in his maths exam, because he tends to regard his mistakes as ______.
A．neglected
B．neglectful
C．negligible
D．negligent
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