在线求指导：It was so cold that It was so cold that they kept the fire ____ all night. [ ] A.to burn B.burn C.burning D.burned

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在线求指导：It was so cold that It was so cold that they kept the fire ____ all night. [ ] A.to burn B.burn C.burning D.burned
在线求指导：It was so cold that

It was so cold that they kept the fire ____ all night. [      ]
A.to burn    
B.burn      
C.burning    
D.burned

在线求指导：It was so cold that It was so cold that they kept the fire ____ all night. [ ] A.to burn B.burn C.burning D.burned

C