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The Internet is really ________ to us. We can get a lot of things from it.
A.usefulB.difficultC.differentD.safe
A

试题分析:句意:因特网对我们确实有用,我们可以通过它获得很多东西。所给选项中A是有用的,B是困难的,C是不同的,D是安全的,根据题意此题选A。
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