Only through constant practice can the ability of using a foreign language be _______.
A．earnedB．a(chǎn)cquiredC．gainedD．a(chǎn)chieved
B
這題考查詞義辨析：earned掙得acquired(通過努力)獲得， gain獲得（強調(diào)收獲）achieved達到，句意是：只有通過不斷實踐才能獲得使用英語的能力。B符合句意。
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