Question

问一道英语题？

---Marx broke his leg when he was playing football.
---_____ was that?
A.How long ago? B.How long C.Since when D.Since when ago
答案A.

Answer 1

我觉得是A,不过我只学了三四年英语
解释如下
1BCD的用法不对，since when 本身就是语法错误了，不可以用

2how long ago was that
那是多久以前了？

i wonder how long ago this school was built
我想知道这学校多久以前建造的？
加个age就是表示强调多久以前做什么事

因为题目是过去式，肯定是说之前mark摔伤了，然后问多久以前的事啊？代表过去式

3再比如
how long will you be there你会去那多久？
how long have you been to there你在那呆了多久

所以意思不同而已，希望有帮助啦

Answer 2

B