根据短文内容，从方框中选择恰当的单词完成句子。所有单词在填入前不需要进行词形转换，每个单词只能用一次，每空只能填一词。

 At the weekend, many ____  people in the UK do some sports on Saturday morning, and maybe they____  shopping in the afternoon. On Sunday they get up____ . They usually see friends and have lunch with ____  family on that day. In the afternoon they sometimes go for a ____ . But on Sunday evening, it’s time for homework.

____

步骤一,取生理状态相同的六只小白鼠,平均分成甲、乙两组。

步骤二,甲组的小白鼠不做任何处理,取加热杀死的肺炎球菌注入乙组的小白鼠体内,过两周后再分别向甲、乙两组小鼠体内注入活的肺炎球菌。

步骤三,观察实验结果。甲组的小白鼠死亡,乙组的小白鼠存活。

请回答以下问题。