题目

(2018·北京高考)Now Mr Anderson has set up an online campaign to donate money for Mr Smith and other homeless people in the area, ________ by yesterday  had received ￡8,000. 答案：which 句意：现在安德森先生发起了一个网络运动给史密斯和本地区其他无家可归的人们捐款，到昨天为止已经收到了8,000英镑。which引导非限制性定语从句，修饰前面的an online campaign，故填which。把2.5改写成以千分之一为单位的小数是______．