________ all his children come to his birthday party, the old ma

________ all his children come to his birthday party, the old man would be much happier.
A、Might
B、Would
C、Should
D、Could
【正确答案】：C
【题目解析】：该题考查虚拟语气。本题是对将来进行假设的情况，从句省略if,助动词should移到句首就形成了C。