Here are the appropriate words or phrases to fill in the blanks, along with explanations:

(121) **Reducing** – This verb is appropriate because it refers to the act of lowering or decreasing salt intake, which is necessary to prevent health issues.

(122) **expectancy** – The term "life expectancy" refers to the average period that a person is expected to live, which is appropriate in this context when discussing the general health of the population in Japan during the 1960s.

(123) **added** – This is the correct verb because it refers to the action of incorporating salt into food, which contributed to health problems.

(124) **recipes** – The word "recipes" refers to the instructions for making food, and it's the appropriate choice here because food manufacturers are changing their recipes to include less salt.

(125) **have gotten** – This phrase suggests that many consumers have gradually developed the habit of checking nutrition labels, which fits the context of changing behaviors over time.

Explanation of each term:

1. **Reducing** suggests an action of lowering the amount.

2. **Expectancy** refers to the predicted lifespan of a population.

3. **Added** implies incorporating something into food, in this case, salt.

4. **Recipes** indicates the instructions or formulas used by manufacturers for preparing food.

5. **Have gotten** indicates a gradual development of a habit over time.