根据上下文理解，选择所给词的适当形式填空。

minute,  walk,  look,  girl,  cook,  class,  happy,  feel,  key , need

Yesterday was Sunday. We had no  1  . I wrote a letter to my pen pal and   2 lunch for my parents. After lunch I took a   3  with Mike through the park behind my house. We saw a little girl      4   for something. She lost her keys. “She   5  help,” Mike said. So we helped the girl look for her   6 . About ten   7  later, Mike found them in the grass. The girl was   8 . We spent much time in looking for the   9  keys, but we   10  very happy because we did a good deed（做好事）.