A．necessary B．succeed C．along D．August E．silent F．exactly

51．In my hometown，　　is the hottest month of the year．

52．It is quite 　　to check the paper before you hand it in．

53．Stella walked alone in the dark street during the 　　hours of the night．

54．Keep your dream and work hard towards it，and you will 　　sooner or later．

55．My first grade teacher hasn't changed at all﹣she looks 　　the same as before．

56．Tim's family plans to have a self﹣drive trip 　　the Tai Lake this summer．