Minister Bill De Blasio     in office fewer than 48 hours when he came face to face with his biggest challenge in his life．
A．has beenB．had beenC．would beD．is
B               
             
試題分析： 考查時(shí)態(tài)。句意：比爾 部長(zhǎng)當(dāng)他面對(duì)人生中最大的挑戰(zhàn)時(shí)，他才上任不過(guò)48小時(shí)。根據(jù)當(dāng)他面對(duì)挑戰(zhàn)時(shí)，發(fā)生在過(guò)去，而他上任發(fā)生在過(guò)去的過(guò)去，故用過(guò)去完成時(shí)，所以選B項(xiàng)。       
考點(diǎn) : 考查時(shí)態(tài)
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