Only through constant practice can the ability of using a foreign language be . A. earnedB

问题补充：

Only through constant practice can the ability of using a foreign language be .

A. earned

B. acquired

C. gained

D. achieved

答案：

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。