20 It was the middle of November and Tina felt down and depressed. Late autumn was the BAD season of the year. (Прилагательное "bad" описывает время года).
21 It often RAIN and Tina had to spend most of her time indoors. Because of this, she really welcomed the changes in her school routine. The school administration introduced a new class - a dance class. (Существительное "rain" используется как обстоятельство).
22 But not everyone was happy! The boys said that it BE a waste of time. (Глагол "be" используется для обозначения состояния).
23 They often missed the class and, when they attended, they NOT LISTEN to the teacher's instructions but tried to make fun of everything. (Фразовый глагол "not listen" используется для обозначения действия).
24 "I wish we HAVE a class for girls only," Tina thought. (Глагол "have" используется для выражения желания).
Ответ: 20. BAD, 21. RAIN, 22. BE, 23. NOT LISTEN, 24. HAVE