选用方框内所给短语的正确形式填空
fall behind  pay attention to  take on    be suitable for  devote. . . to
【小题1】He could have finished it on schedule, but somehow he ____________________.
【小题2】Do you think this new dress ____________________ me?
【小题3】Great changes has taken place in my hometown and it ____________________ a new look.
【小题4】He __________ all his spare time __________ helping his students with their English when he worked here.
【小题5】These are the things we should ____________________ so as to stay healthy.