Давайте разберемся с заданием. Мы заменим слова в скобках на соответствующие формы слов, чтобы они грамматически соответствовали контексту текста.
20. PREPARE → PREPARED
"he wanted to be sure he prepared everything well."21. CAN → COULD
"Nothing could spoil his victory."22. ONE → ONE (оставляем, это слово уже в нужной форме)
"Being the one was important to him."23. LOOK → LOOKED
"he looked up."24. BE → ARE
"How are you?"25. HE → HIM
"replied to him, sighing."26. YOU → YOURSELF
"Enjoy yourself."27. DO → DID
"You did the best you can, haven't you?"28. WANT → WANTED
"He wanted to say he always did his best."
Теперь подставим все слова в текст:
Полный текст с заполненными пропусками: Tom Perry concentrated hard. The rocket competition was going to begin shortly, and he wanted to be sure he prepared everything well. Every possible error had to be checked. Nothing could spoil his victory. Tom had never lost a contest, but that didn't calm him. Being the one was important to him, and he pushed himself to remain there. A shadow fell over his shoulder, and he looked up. His father stood there, and Tom was glad to see him. "How are you?" his father asked. "Fine," Tom replied to him, sighing. He was trying to put one part of the rocket in the wrong way and finally turned it around. "Relax," his father said. "Enjoy yourself. You did the best you can, haven't you?" Tom nodded. He wanted to say he always did his best.
Теперь вы видите, как правильно использовать каждую форму слов в предложениях. Если у вас остались вопросы или нужно больше деталей, дайте знать!