老师教给我们几种有效的学习策略来提高考试成绩。

The teacher taught us several effective learning ___strategies to improve test scores.

教练的出色策略帮助球队赢得了比赛。

The coach's excellent ___strategies helped the team win the game.

我们需要制定长期的投资策略来实现财务自由。

We need to develop long-term investment ___strategies to achieve financial freedom.