问题补充：
How I wish it! If it in a couple of days, the crops would survive.
A. will rain; rained
B. would rain; should rain
C. should rain; rains
D. would rain; had rained
答案：
A. will rain; rained
(答案→)B. would rain; should rain
C. should rain; rains
D. would rain; had rained
解析：wish后接引导的宾语从句, 用would+动词原形, 表示与将来事实相反的愿望; 再由 “in a couple of days”和 “would survive”可知, if从句要用should +动词原形或一般过去时, 表示与将来事实相反的假设。
