Good evening,
1- starting with question No1
most subject questions are singular
So, you say :
Who celebrates......?
2- About question No2
killing time in not a murder (True)
It is suicide.
3- Going to question No3
The text ends with the expression that (none was proved) so it is False
because based on the text it nothing was proved.
Don't worry about the exam it will be clear
Good Luck
Ola M 🌷