问题补充：
–- Helen, are you going to the airport to see Jack off the day after tomorrow?
-- , I would go.
A. Were he to leave tomorrow
B. If he was about to leave tomorrow
C. Was he to leave tomorrow
D. If he would leave tomorrow
答案：
(答案→)A. Were he to leave tomorrow
B. If he was about to leave tomorrow
C. Was he to leave tomorrow
D. If he would leave tomorrow
解析：句意：--海伦，后天你要去机场给杰克送行吗？--要是他明天走，我就去。因为杰克是后天走，所以海伦的假设是不真实的，用虚拟语气，因为是和将来相反，所以条件句用were to do，也可以省略if，提前were，所以选A。
