问题
选择题
American English has changed ________ time．There are several reasons ________ this.
A．over; for
B．for; with
C．in; of
D．during; about
答案
答案：A
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。