have a ball
例，I really had a ball at your party.
The little ones had a ball in the park the whole afternoon.
The ball is in your court.
用：指采取行动等。your可换成his, her, their, Jack's等人称。
例 .Naw you know everything. The ball is in your court-are you going todismiss him or give hirn another chance?
.Well, that's all I know about the matter, now the ball is in your court,Bi11.