----I like British culture very much，and I once went to London.
----How long ______ there?
A.did you stay B．have you stayed C．were you staying D．had you stayed
----I like British culture very much，and I once went to London.
----How long ______ there?
A.did you stay B．have you stayed C．were you staying D．had you stayed
A
A 又”and I once went to London” 可知是对过去事情的陈述，因此应用一般过去时，意思是：你那时在那呆了多长时间？