问题补充:
—I am going to America.
—how long you there?
A. are; stayed
B. are; staying
C. have; stayed
D. did; stay
答案:
A. are; stayed
(答案→)B. are; staying
C. have; stayed
D. did; stay
解析:考查时态。用现在进行时代替一般将来时,表示按照计划安排要发生的事情。句意:—我要去美国、—你计划在那里待多久?故B正确。
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