Read the following passage about Japanese sushi culture and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each blank from 18 to 22.

The art of sushi-making, deeply rooted in Japanese culinary heritage, reflects precision and tradition that spans generations. The careful selection of fresh fish and rice, essential to authentic sushi preparation, ___(1)___. A recent global study presents new findings about ancient sushi techniques ___(2)___. This discovery has revolutionized our understanding of traditional Japanese cuisine.
Creating traditional nigiri sushi demands years of dedicated training and unwavering dedication to culinary excellence. In particular, ___(3)___. Master chefs spend decades perfecting their knife skills and rice preparation, ensuring each piece meets the highest standards of quality. In prestigious kitchens, ___(4)___. The Tokyo Sushi Academy's research into traditional methods has revealed the importance of temperature control in rice preparation, leading to enhanced flavor profiles and texture. Contemporary sushi masters continue to honor these time-tested principles while adapting to modern tastes.
Determined to preserve authentic sushi-making techniques, ___(5)___. This dedication ensures that traditional sushi craftsmanship continues to thrive in an era of fusion cuisine and modern interpretations.
(Adapted from Japanspecialist.com)