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
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
A
由前句可知，“You”已回来了（不在俄罗斯），那么“You”在俄罗斯呆了多久是指过去的时间。