问题
选择题
You will see what great benefit the computers you own can be _____ every time we use them.
A． at
B．of
C．for
D．on
答案
答案：B
本题考查介词。将从句what great benefit the computers you own can be变为正常语序应是the computers you own can be_____what great benefit。其意义是“你的电脑可能非常有用处”故用介词of。
be of great benefit（ to）（对……）很有帮助。