I'mafraidit__tomorrow,butwhoknow?

I'mafraidit__tomorrow,butwhoknow?: I'm afraid __tomorrow, but who knows? A.may have rained B.might rain C.would rain D.ought to rain 为什么是选B呢?我觉得选C哦; I'm afraid it __tomorrow, but who knows? A.may have rained B.might rain C.would rain D.ought to rain 选B。根据后面的who knows可知前半句要表示“推测”，且无把握。“may,might,could+动词原形”可以表示对“现在或将来的推测”，故选B。不选C。would不能表示推测。当然，改为will rain也就可以了。