Part I. STRESS

1. C. observe The main stress falls on the second syllable in option C, while the other options have the stress on the first syllable.

2. D. protect The main stress falls on the second syllable in option D, while the other options have the stress on the first syllable.

Part II. VOCABULARY AND GRAMMAR

1. C. barefoot The context suggests that the children walked without shoes or sandals, so "barefoot" is the most appropriate choice.

2. B. deep-rooted This option implies that the custom has been firmly established for a long time.

3. A. heritage Cultural heritage refers to the traditions, customs, and historical sites of a country.

4. C. generation Festivals are passed down from one generation to the next.

5. C. worshipping The custom involves paying respect to ancestors, which is typically done through worship.

6. B. dishes Fried rice is a type of dish, a prepared food.

7. A. ingredients Ingredients are the components used to make a dish.

8. D. meal A traditional English meal refers to a complete food course.

9. D. could The sentence expresses a wish for something that is currently impossible, so "could" is the correct choice.

10. A. having The sentence expresses a desire for more time, so "having" is the correct choice.

11. C. were finishing The action of finishing was ongoing when the rain started, so the past continuous tense is appropriate.

12. D. was packing The action of packing was ongoing when the money was found, so the past continuous tense is appropriate.

13. B. was talking The action of talking was ongoing while the speaker went to the Exhibit Hall, so the past continuous tense is appropriate.

14. B. we cook five-colour sticky rice The sentence expresses a custom or tradition, so the present tense is appropriate.