問題詳情
【題組】69. The underlined "it" ( paragraph 4 ) refers to________
(A) a great push
(B) the idea of living beyond the present life span
(C) the idea of living from 200 to 300 years
(D) the conservative estimate
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)