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has been studying Chinese ____ he was 6 years old.. have been watching you ____10 minutes. since for since for since for Write the questions: 1_______________________________? He has been standing there for four hours. 2___________________________? I have been riding a bike since I was ten years old. 3___________________________________? She has been walking for five hours. ? I’ve been watching TV since 7:00 ? He’s been waiting for the train for an hour. I collect… I would like to collect….. I collect shells because they are beautiful . I ‘d like to collect stamps because they are interesting.