1. a sure recipe

2. a mouth-watering recipe

3. follow/stick to/use the recipe

4. This recipe makes about thirty biscuits.

                        serves four people

5. a recipe for living young

6.学好英语的诀窍是要有强烈的学习和练习意愿。

Being eager to learn and practice is a recipe for learing English.

A strong willingness to learn and practice is the recipe for English fluency.

The recipe for English fluency requires a strong willingness to learn and practice.

7. 结合生词来理解生词更有利于我们的记忆和理解。

Pictures are a recipe for comprehending a new word.