[单选题]（）all his children come to his birthday party, the old man would be much happier.
A
Might
B
Should
C
Would
D
Could
正确答案：B
题目解析
本题考查虚拟语气。根据后面的would be可以判断是虚拟语气。原来的语序应该是If all his children should come to his birthday party…，当省略if的时候，要把主语all his children后面的词提前，因此变为should all his children......
