Only through constant practice can the ability of using a foreign language be .
A. earned
B. acquired
C. gained
D. achieved
网友回答
A. earned
(答案→)B. acquired
C. gained
D. achieved
解析：这题考查词义辨析：earned挣得acquired(通过努力)获得， gain获得（强调收获）achieved达到，句意是：只有通过不断实践才能获得使用英语的能力。B符合句意。