The Internet is really ______ to us. We can easily find the information we need.
A．safeB．hardC．boring D．useful
D
形容詞辨析。safe意為“安全的”，hard意為“難的”，boring意為“無聊的”，useful意為“有用的”。由句意“因特網(wǎng)真的對(duì)我們有用，我們可以很容易地找到我們所需要的信息”可知，只有useful符合句意。故選D。
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