问题补充：
The boy has 12 basketball (对画线部分提问）画线部分为12
答案：
How many basketballs does the boy have
======以下答案可供参考======
供参考答案1:
How many basketballs does the boy have ?
供参考答案2:
How many basketball does the Boy have?
供参考答案3:
How many the boy has basketballs?
