【正确答案】 B

【答案解析】postulate：假定。与assume(设想；假定)意思相近。I assume you don't drive，Mr． Jones?琼斯先生，我想你不会开车吧? challenge：挑战。His authority was challenged．他的权威性受到了挑战。deduct：减去。Tax will be deducted automatically from your wages．税会自动从你工资中扣除。decree：颁布(法令、政令)。The minister decreed that there would be a full investigation over this matter．部长下令，将对此进行全面调查。