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As is known to all language learners, the newly learnt words will soon be forgotten unless they are _______ used in everyday communication.
A．graduallyB．sincerelyC．hopefullyD．frequently
D
本題的含義是所有的語言學(xué)習(xí)者都知道，如果我們在日常的交流中，不能頻繁地使用所學(xué)的新單詞，那么它們會被很容易忘記。frequently表示頻繁地意思，故本題選D。
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