【正确答案】 B

【答案解析】[解析] 划线词的意思是“假定”，B项意为“假定，设想”，例：I assumed you can speak French fluently.我以为你能讲流利的法语。A项意为“挑战”，例：They had challenged and beaten the best team in the world.他们曾向世界上最强的球队挑战并将他们打败。C项意为“扣除，减去”，例：Nowadays income tax is normally deducted from a person's wages.现在，所得税通常是在发工资前就已经扣除了。D项意为“判决，裁定”，例：The committee decreed the movie unsuitable for children.委员会裁定这部影片为儿童不宜片。