阅读下面短文，从短文后各题所给的四个选项（A，B，C，D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
For centuries, magicians have used various ways to shock the audience. We all have seen how a 36 performer carefully steps 37 a bed of burning co als -- barefoot. Then he walks across 38 a single burn on his feet. Is it mind over matter, or is it just physics? As it turns __39 , walking on burning coals isn’t that hot as 40 . “The coals are hot enough to 41__ you, but if you walk quickly across them you 42 being burned.” says Jonathan Hall, a physician at Penn State University in Eric Pennsylvania.
