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
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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：B