問題詳情:
Two fifths of the highway________so far.
A.has been completed B.was completed
C.have been completed D.has completed
【回答】
分數在此指代的是the highway,與complete之間在邏輯上是被動關係,由so far可知用現在完成時。
*: A
知識點:動詞時態
題型:選擇題