题目

下列事件中，属于不确定事件的是（ ）A．海口市的年平均气温比哈尔滨的年平均气温高B．从装有50个黄球的袋中随机取出2个球，这2个球都是白色的C．每晚7时，中央电视台1套播出“新闻联播”节目D．从装有10个黄球，4个白球（这些球除颜色外其余都相同）的袋中，随机取出2个球，1个是黄球，1个是白球根据短文内容及首字母提示，补全单词。Mr．Jones had a quarrel with Mrs．Jones the other day．So they were very angry with each other．For several days they did not s 【1】 to each other at all．One evening Mr．Jones was very t 【2】 when he came back from work, so he went to bed at once after d 【3】 ．Of course he did not say a 【4】 to Mrs．Jones before he went upstairs．Mrs．Jones washed the dishes and then did some sewing．When she went up to bed much l 【5】 than her husband, she found a p 【6】 of paper on the small table near her bed．On it were the words, ‘Mother---Wake me up at 7 a．m．---Father．’When Mr．Jones w 【7】 up the next m 【8】 , it was nearly 8 a．m．---and on the small table near his bed he saw a 【9】 piece of paper．He took it and r 【10】 these words: ‘Father---Wake up．It’s 7 a．m．---Mother．’