He became solely responsible for the firm.

　　他成了公司唯一的負責(zé)人。

　　He felt morally responsible for the accident.

　　他覺得在道義上應(yīng)對這次事故負責(zé)。

　　He is too impulsive to be a responsible mayor.

　　他太容易沖動，無法成為一個可靠的市長。