答案：A

考查介词。第一空填to比较好理解，因为此处的late为副词，用以修饰 go to the stadium

中的动词go；而第二句的 with 则是许多同学不容易想到的，相反，更多地可能是想到 for，

现将两者区别如下：be late for表示做某事迟到，而be late with 表示做某事做晚了(="be" late in doing sth)。比较：

We were late for dinner. 我们吃饭迟到了。

We were late with dinner [="in" having dinner]. 我们吃饭吃得迟。

句中 my wife was a little late with the supper 的意思是“我妻子准备晚饭稍迟了一点”。