Smoking makes one six times more likely to get oral cancer partly because the smoke constantly
assaults
the tissues that line the mouth and throat.
【正确答案】
D
【答案解析】解析：句意：吸烟使得患口腔癌的几率增高六倍，部分原因是吸入的烟会持续攻击口腔和咽喉表层的薄膜。assault攻击，袭击。attack攻击。detect察觉，发觉。contaminate污染。occupy占据，占用。