用方框中所给短语的适当形式填空。
believe in，keep one's cool，be thirsty for，set out，separate from
【小题1】He tries to keep his professional life completely ________________ his private life.
【小题2】They have made up their mind to ________________ for Shanghai tomorrow morning.
【小题3】Young man should ________________ knowledge.
【小题4】I think you should try to ________________ even though you argue.
【小题5】I ________________ your ability to solve the problem.