单选题 I wish my sister ______ in Chongqing for one more week.
A) could stay C) is staying
B) stays D) has stayed

【正确答案】 A
【答案解析】本题考点是虚拟语气。wish表示将来不能实现的愿望时，用would/could+动词原形。本句大意：我希望我妹妹能在重庆多住一个星期。