Question

---Please write to me when you have time.

---Sure. But ________ is your e-mail address?

1. A.
   what
2. B.
   where
3. C.
   which
4. D.
   how

Answer 1

A
该题考查疑问词用法．根据会话的语境，答话者在询问对方的电子邮件地址是什么，应用疑问代词作表语，有A、C供选择．what不受范围限制，which受范围限制．空白所在句子中疑问代词的用法属于前者．
试比较：
What's your name?你叫什么名字？
Which do you like better, physics or chemistry?物理和化学，你最喜欢哪门功课？