The elderly need special care in winter as they are to the sudden change of weather.A. s

问题补充：

The elderly need special care in winter, as they are to the sudden change of weather.

A. sensitive

B. negative

C. flexible

D. sensible

答案：

(答案→)A. sensitive

B. negative

C. flexible

D. sensible

解析：句意，老年人在冬天需要特殊的关照，因为他们对于天气的突然改变很敏感。Sensitive敏感的negative消极的flexible灵活的sensible明智的，根据题意，故选A。