每天锻炼可以减轻体重。

Daily exercise ___reduces body weight effectively.

老师把这个复杂的数学问题简化为五个基本步骤。

The teacher ___reduced the complicated math problem to five basic steps.

把汤煮到只剩一半就能让味道更浓郁。

Let the soup simmer until it ___reduces to half its volume for a richer taste.

这场旱灾使许多农民陷入了贫困。

The drought ___reduced many farmers to poverty.