To my surprise, my good friend _________ stay up to study to prepare for the next important exams organized by ten famous high schools.
He must be from America, ____ can be judged from his accent.
This is the hotel ______ we stayed last year.
Do you know when Mr. Brown _______? When he _______ , please let me know.
My uncle _____ to see me. He'll be here soon.
Look out! That tree _____ fall down.