(2013·昆明一模)The landlord wants to ________  the rent by $ 30 a month,    which I think is unacceptable.

(2013·高考安徽卷)Traditionally，college students hold a graduation ceremony to encourage themselves before they ________ on their life journey.

The man who provided relevant information would be offered a(n) _____ of $5000 for the arrest of the murderer, according to the news on TV last night.

The lady said she would buy a gift for her daughter with the _______.

Giving up my job to go back to full­time education was a big ________，but now I know it was the best decision I ever made.                                      (2011·湖北，22)