Glad to see you back. How long in Russia?A. did you stayB. have you stayedC. were you sta

问题补充：

Glad to see you back. How long in Russia?

A. did you stay

B. have you stayed

C. were you staying

D. have you been staying

答案：

(答案→)A. did you stay

B. have you stayed

C. were you staying

D. have you been staying

解析：

试题分析:考查动词时态。从语境可知对方已经从俄罗斯回来了，所以在俄罗斯的停留应该是过去的动作。故A 选项正确。句意：见到你回来很开心。你在俄罗斯待了多久呢？