But he says some countries including Botswana, Mauritius and Cape Verde have worked hard to improve their governance.

VOA: special.2009.11.28

Were you and the president and everybody else in the White House worked as hard as you could, but things just sort of run away, took on a life of its own.

你们在白宫,尽心尽力地工作,但形势却还是会失控吗，就像是自己有想法似的。

普林斯顿公开课 - 国际座谈会课程节选

But the National Rifle Association has worked hard to fight restrictions on weapons.

VOA: special.2011.01.15

Her father worked hard but had not been very successful.

VOA: special.2010.04.25