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Today’s world is changing rapidly, making _____ necessary for us to continue learning otherwise we can’t keep up with the time.
A．usB．itC．thisD．one
B
考查代詞的用法。句意“當(dāng)今的世界變化飛快，使得持續(xù)學(xué)習(xí)變得很有必要，否則我們就會(huì)跟不上時(shí)代的發(fā)展�！眒ake it+形容詞for sb. to do sth.，it是形式賓語(yǔ)，不定式是真正的賓語(yǔ)。故選B。
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