19. Egyptians invented the twenty-four hour day long ago, and people ____

問題詳情

19. Egyptians invented the twenty-four hour day long ago, and people _____it since then.
(A) used
(B) are using
(C) have used
(D) will be using

答案：C
難度：簡單0.8
統計：A(2),B(0),C(8),D(0),E(0)