根据中文提示，用词组的适当形式填空。每空一词。

1．I hope that my dream will                         (实现)in the future．

2．My grandma goes to the park                         (步行)every morning．

3．--Are you                (擅长)chemistry?

    --Yes，I am．

4．The physics problem is so difficult that I can’t         it           (算出)．

5．One of my classmates is going to be a policeman when he                   (长大)．