问题
选择题
David. we _____ sugar. Could you go and buy some?
A. have been run out of B. have run out of
C have been run out D. have run out
答案
答案：B
题目分析：句意：我们的糖已经用光了。你能再去买些吗？Run out of 的意思是用光。这里强调的是糖用光了的结果，而不是时间所以要用现在完成时。主语是we，所以不需要用被动语态。故选B.