You will find what great benefit the computer you own can be _____ each time you use it to help you work.

You will find what great benefit the computer you own can be _____ each time you use it to help you work.

A．for              B．at                C．of               D．on

You will find what great benefit the computer you own can be ________ each time you use it to help you work.（ ）

A. for　　　　　 B. at　　　　 C. on　　　　　　 D. of　

You will find what great benefit the computer you own can be _____ each time you use it to help you work.

1. A.
   for
2. B.
   at
3. C.
   of
4. D.
   on