问题补充：
He is waiting for his friends.对划线部分提问.划线部分是：his friiends
答案：
Who is he waiting for?
======以下答案可供参考======
供参考答案1:
Who is he waiting for?
供参考答案2:
画线部分是虾米
供参考答案3:
Who is he waiting for?
供参考答案4:
Whom is he waiting for?
供参考答案5:
Who is he waiting for?
