周日我们看了两场连赛，先是一场棒球赛，接着是一场足球赛。

On Sunday we watched a ___doubleheader, first a baseball game followed by a soccer match.

周六我们将迎来一场棒球双赛，下午和晚上各有一场比赛。

We're having a ___doubleheader on Saturday with two baseball games, one in the afternoon and one in the evening.