American English has changed ________ time．There are several reasons ________ this.

    A．over; for    B．for; with    C．in; of   D．during; about

American English has changed ________ time．There are several reasons ________ this.

American English has changed ________ time．There are several reasons ________ this.

1. A.
   over; for
2. B.
   for; with
3. C.
   in; of
4. D.
   during; about