問題詳情

二、語法與用法（11~20 題，選出最適當的選項） 11. Vitamin C, discovered in 1932, ____ first vitamin for which the molecular structure was established.
(A) as the
(B) being the
(C) was the
(D) were the

參考答案

答案：C
難度：非常困難0
統計：A(1),B(0),C(15),D(1),E(0)