問題詳情
116. FAX, the abbreviation for facsimile machine, was invented in 1901, but until recently _______mainly for transmitting newspaper photographs and weather maps.
(A) which was used
(B) were used
(C) using
(D) used
參考答案
答案：D
難度：困難0.285714
統計：A(3),B(2),C(0),D(2),E(0)