Old people need special care in winter as they are very to sudden change of the weather.A

问题补充：

Old people need special care in winter, as they are very to sudden change of the weather.

A. sensitive

B. painful

C. attractive

D. familiar

答案：

(答案→)A. sensitive

B. painful

C. attractive

D. familiar

解析：词义辨析。A. 敏感的，易受伤害的 B. 痛苦的C .引人注目的 D. 熟悉的。句意：老人在冬季需要很好地照顾，因为他们非常容易受到天气突然变化的伤害。故选A。