He became solely responsible for the firm.

　　他成了公司唯一的負責人。

　　He felt morally responsible for the accident.

　　他覺(jué)得在道義上應對這次事故負責。

　　He is too impulsive to be a responsible mayor.

　　他太容易沖動(dòng)，無(wú)法成為一個(gè)可靠的市長(cháng)。