根据句意,用所给单词或短语的恰当形式填空.(每次或短语只限使用一次)
ride,take,instrument,diary,on one's way to
the group ( )a tour around dunhuang
many students in our class  keep a ( )
i met an old friend( )school this morning
lihua ( ) his bicycie to work every day
erhu is one of the chinese( )