问题

It is about ten years _____ I met you last.
A:since
B:for
C:when
D:as
B:for
C:when
D:as
正确答案是:
同类题型
Helen, do you know if Martin _______ to my party next week—-I think he will come if he _______ free.
He hesitated for a moment before kicking the ball, otherwise he ____ a goal.
They produced two reports, ______ of which containedany useful suggestions.