问题
选择题
By the time the police came to rescue the old woman, she _______for four days under the house.
A．buried
B．had buried
C．had been buried
D．has been buried
答案
答案：C
考查时态及语态。By the time+ 一般过去式的句子，后面的主句应用过去完成时态，句意：到警察来就这位老妇人的时候，她已经在房子下面被埋了四天了。根据语境应用过去完成时态的被动语态。故选C。