Every minute counts before the College Entrance Examination. So we must the limited time.
Is this dictionary _____ you bought yesterday?
The skirt ______ she spent 50 yuan is very beautiful on her.
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.