问题
选择题
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
答案：B
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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