（）是国际象棋和中国象棋的共同原型。
参考答案：印度象棋
用所给词的适当形式填空。
1. That is ______ (she) brother.
2. ______ (be) this your sister?
3. They are my______ (grandparent).
4.______ (my) am Gina.
5. ______ (this) are my friends.
