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____ . I wrote a letter to my pen pal and____ lunch for my parents. After lunch I took a ____with Mike through the park behind my house. We saw a little girl____ for something. She lost her keys. “She ____ help,” Mike said. So we helped the girl look for her____ . About ten____ later, Mike found them in the grass. The girl was ____ . We spent much time in looking for the____ keys, but we____ very happy because we did a good deed（做好事）.
