I have been studying at NESE__since_______ january.
My head hurts!I have had a headache________for_______four hours.
Jake hasn't worked____since______last summer.
He has been unemployed_____for______seven months.
I am so hungry!I haven't eaten anything__since_____yesterday morning!
We haven't eaten anything___for_______a day!
They have been playing tennis _____since________9：00 am.