問題詳情

In 1864 George Pullman designed a sleeping car that __________ saw widespread use.
(A)previously
(B)eventually
(C)familiarly
(D)simultaneously

參考答案

答案:B
難度:適中0.592927
統計:A(469),B(1509),C(234),D(333),E(0)

內容推薦