Потому что whom и which ставят ограничение если есть выбор
1. The pupils are listening to their headmaster now.
2. The headmaster is talking to the pupils.
3. The football team are sitting down now.
Хобби на английском переводится как увлечение или занятие
19)
В номере а предложение не имеет смысла. Напишите в комментарии это предложение как в задании и я Вам отвечу.
b. I always go for a walk before going to bed.
c. I am usually tired when I get home.
d. We usually don't go to the beach in summer.
e. Juana is never late for class.
20)
a. Don usually gets up at 7:00 am
b. Sue always has a big breakfast.
c. Rick sometimes goes to the gym.
d. Dana usually takes her children to school
e. Kate usually doesn't have dinner before 8:00 pm
f. Jack never goest to bed before midnight.
When do you usually go for your summer holidays?