They pretended to be working hard all night with their lights __

They pretended to be working hard all night with their lights _______.
A、burn
B、burnt
C、burning
D、to burn
【正确答案】：C
【题目解析】：burn“点燃、发亮、发光”，是不及物动词，所以和their lights是主动关系，所以用现在分词。