根据汉语提示写单词。

1. My _________ (钥匙) are on the table.

2. —_________ (在哪里) is the baseball?

    —I don't know.

3. My backpack is _________ (在……下面) the dresser.

4. Please _________ (带来) your dictionary to school tomorrow.

5. The boy is _________ (在两者之间) Betty and Kate.

简述根据游戏的关键特征对游戏的分类。