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respond to对…作出反应〔回答〕
例句：The woman conductor kindly responded to my question.
女列车员亲切地回答了我的问题。
The teacher responded affirmatively to the question that student put forward.
老师对那个学生的问题作了肯定的回答。
2.It's not just that the US worries about the destabilising potential of violent unrest at the heart of the Arab world at a time when President Mubarak's days in office are gradually drawing to a close.
draw to a close渐近结束
例句：Easter festivities in Latin America draw to a close on Wednesday. :
拉丁美洲的复活节庆典周三就要接近尾声了。
3.A build-up of gases is being blamed for the explosion at the small mine which feeds domestic consumption.
blame for为...而责备，归咎于，责怪
例句：Don't keep blaming your little sister for your bad behavior.
不要总是把你的不良行为怪在你的小妹妹身上。
He blamed his brother for breaking the window.
他责备他兄弟打破了窗玻璃。
4.Amnesty International accused Shell of abusing human rights and failing to clean up environmental damage.
clean up对…作最后处理, 结清
例句：They clean up old debts.
他们结清了旧债。
整顿; 实行改革
例句：The new mayor said he would clean the city up.
新市长说, 他要整顿本市。
