You will see what great benefit the puters you own can be _____ every time we use them.A.atB.ofC.forD.on
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B解析本题考查介词。将从句what great benefit the puters you own can be变为正常语序应是the puters 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。