【题目】Only five years after Steve Jobs' death ,smart –phones defeated _________PCs in sales.
A.controversial
B.contractory
C.confidential
D.conventional

【答案】D
【解析】句意：在乔布斯去世仅仅五年后，智能手机在销量上战胜了传统的个人脑。A. controversial 有争议的；B. contradictory对立的，相互矛盾的；C. confidential机密的，秘密的；D. conventional传统的，智能手机在销量上打败了传统的个人电脑，故选D。