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