重点讲解：
1. set alight 燃烧；着火；
A cigarette set the dry grass alight.
一支香烟把干草点燃了h|JOjAx0Ti^!fH;p。
2. gun down 枪杀；开枪射伤；
He had been gunned down and killed at point-blank range.
他被近距离开枪射杀KA85#p0&@bP。
3. respond to 应对；作出回应；作出反应；
Like any other public servants, police must respond to public demand.
和其他所有公务员一样，警察必须服务于公众的需求3g*.~Cih)s[9dSnV。
4. in contact with 保持联系；有联系；
We're in contact with the children and with the children in hospital and it seems to be being managed well.
我们跟在酒店隔离和在医院治疗的孩子们都保持着联系，看起来各方面安排的都很好M%g4]l&huS.GoPJED。