It was so cold that they kept the fire all night.A. burnB. burningC. burnedD. burns

问题补充：

It was so cold that they kept the fire all night.

A. burn

B. burning

C. burned

D. burns

答案：

A. burn

(答案→)B. burning

C. burned

D. burns

解析：考查非谓语动词。句意：天如此的冷以至于他们让火着了整一个晚上。the fire 与burn 之间是主谓关系，所以用现在分词burning，在这里作宾补。故选B。