Whatever work you are doing, you should concentrate your attention ______it

tic people can be very difficult sometimes—Well, you married one

Only if you work hard _____, because hard work is the ultimate source of success.

下列各项中和例句句式相同的一项是 例句：唯倜傥非常之人称焉

下边句子中加横线的熟语，能够替换为括号中成语的一项是（ ）