问题补充：
Miss Wang in three days because she is going to see her grandparents.
A. is back
B. will be back
C. comes back
D. are going to be back
答案：
A. is back
(答案→)B. will be back
C. comes back
D. are going to be back
解析：句意：因为王小姐在去看望她的祖父母她将在三天后回来。根据时间状语in three days可知这里应该用一般将来时，故排除AC；因为主语Miss Wang是第三人称单数，所以排除D。故选B。
