用所给词语的适当形式填空，每词仅用一次．

nine， ours， beside， punish， after all

（1）Don't lose heart． You are new to the work　　．

（2）According to the present law， drunk driving must　　 seriously．

（3）I always keep a dictionary　　 me when I'm doing crosswords．

（4）Last Sunday the whole family celebrated my sister's　　 birthday．

（5）The main difference between our brains and those of monkeys is that　　 are bigger．