Question

--- ________ did you start to play football?

--- I started to play football when I was six.

[　　]

A．When

B．How long

C．What time

D．How far

Answer 1

答案：A
解析：

解析：对话中的答语由时间状语从句when I was six来表示，所以选特殊疑问词when。