As the life they were used to _____ changed by the terrible earthquake, the people in the earthquake-stricken area are doing all they can ______ their new life.A.have now been, buildB.having now been, to buildC.has now been, to buildD.is now, build
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C解析句意：因为他们习惯的那种生活现在已经被可怕的地震改变了。所以在地震袭击的地区人们正在尽他们所能建造他们的新生活。they were used to 为定语从句，修饰先行词the life，根据语境应用完成时态，do all sb can to do sth 尽某人所能做某事，故选C。