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The problem is so complex that I'm afraid it will take me several hours to________

Aput out Bset out

Cbreak out Dfigure out

 

D

【解析】D 考查短语辨析。put out熄灭生产;set out出发着手;break out爆发突然发生;figure out算出解决。句意:这个问题如此难因此我认为我不得不需要花费几个小时来解决它。

 

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