问题补充:
I’m so glad to see you back, Lucy. How long at your grandma’s?
A. had you stayed
B. did you stay
C. have you stayed
D. would you stay
答案:
A. had you stayed
(答案→)B. did you stay
C. have you stayed
D. would you stay
解析:考查时态。根据句意可知已经回来,故用一般过去时态。句意:很高兴看到你回来了,你再你爷爷家呆多长时间?
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