教练点头示意，给了我们继续训练的信号。

The coach nodded and gave us the ___go-ahead to continue training.

导演点了点头，给了演员们开始的信号。

The director nodded, giving the actors the ___go-ahead to start.

他的干劲十足的态度让团队充满了活力。

His ___go-ahead attitude energized the whole team.