问题补充：
In winter people usually keep flowers in their houses to them from the cold weather.
A. produce
B. provide
C. protect
D. plant
答案：
A. produce
B. provide
(答案→)C. protect
D. plant
解析：句意：冬季人们经常在房子里养花为了保护花不受寒冷天气的侵害。A生产B提供 C保护 D种植；根据句中的意思是保护花不受寒冷气候的危害。短语，protect... from。故选C.
