单项选择题

My grandfather was already over seventy, buy he was still ______ and lively.

A．effective
B．organic
C．singular
D．vigorous
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单项选择题
Professor Wheelock is always very ______ to the reaction of the audience when he gives lectures.
A．sentimental
B．sensible
C．sensitive
D．positive
单项选择题
The doctors came to the conclusion that the patient's blindness was ______.
A．contemporary
B．temperate
C．consistent
D．temporary
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