标题: As of+时间怎么用(附上kaplan的例题) [打印本页] 作者: 好吧 时间: 2011-7-31 01:03 标题: As of+时间怎么用(附上kaplan的例题) As of this morning, none of my friends have been able to solve the puzzle contained in last week's newspaper.
(A) none of my friends have been able to solve
(B) none of my friends was able to solve
(C) not one of my friends has yet been able to solve