问题
选择题
— I'm going to the States.
— How long ______in the States?[ ]
A. you stay
B. did you stay
C. have you stayed
D. are you staying
答案
答案：D
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— I'm going to the States.
— How long ______in the States?[ ]
A. you stay
B. did you stay
C. have you stayed
D. are you staying
答案：D