根据句意及首字母提示完成单词。

1. Many people like playing computer g _____ .

2. It's Friday t _____ , and it's Saturday tomorrow.

3. What's your p_____  for this winter holiday?

4. Would you like to s _____  at home, Tony?

5. We often play football on the p _____. 

在刺激变量中，对反应时间影响比较大的因素有：（）、（）等。