In the north people sometimes tie straw ropes (草绳) round the trees in winter to them from

问题补充：

In the north people sometimes tie straw ropes (草绳) round the trees in winter to them from the cold.

A. stop

B. prevent

C. save

D. protect

答案：

A. stop

B. prevent

C. save

(答案→)D. protect

解析：词义辨析。 A.停止，阻止；B. 预防，防止；C. 救援，节省；D. 保护，警戒。句意：在北方冬季人们有时在树的四周系上草绳老保护他们应对严寒。故选D.