Which sentence contains a verb in the imperative form? if i were a journalist, i would attend the world press freedom day event. world press freedom day was established to honor journalists. journalists wish world press freedom day were more widley celebrated. tell me about world press freedom day.

The sentence which contains a verb in the imperative form would be the last option. "Tell me about World Press Freedom Day"
A super easy way to determine this is that imperative is always going to be a command.
For example :
"Go tell your mother you are sorry."
"Pick up the papers."
"Don't chew with your mouth open."
These are examples of imperative sentences. 

Hope I helped! If you have any other questions or would like further explanation just let me know! :)