American English has changed time．There are several reasons this.
A. over; for
B. for; with
C. in; of
D. during; about
网友回答
(答案→)A. over; for
B. for; with
C. in; of
D. during; about
解析：考查介词。句意：美式英语随着时间已经改变了。对于这个有几个原因。随着时间要用over time．是什么的原因，要用reasons for。。。所以选A。