如何对three days ago提问

问题描述

比如下面一句，如何对其中的three days ago提问呢？

The manager arrived here three days ago.

下面两个答案哪个对？

When did the manager arrive?

How long ago did the manager arrive?

老师答疑

沅老师：

下面两个答案都对：

When did the manager arrive? 

How long ago did the manager arrive?

但用 how long ago 比用 when 意思更明确。