网址：http://m.1010jiajiao.com/timu3_id_3208652[举报]
Failure is the mother of success. ______ your courage and you’ll succeed.
A. Keep off B. Keep out C. Keep up D. Keep on
Failure is the mother of success. ______ your courage and you’ll succeed. A. Keep off B. Keep out C. Keep up D. Keep on