问题
选择题
It was very cold, so we __ the fire__ all the time/
A．have.. burnt
B．had… burned
C．had… burning
D．have… burning
答案
答案：C
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It was very cold, so we __ the fire__ all the time/
A．have.. burnt
B．had… burned
C．had… burning
D．have… burning
答案：C