Решение:
Чтобы выполнить задание, нужно вставить подходящую форму глагола 'to be' (is, isn't, are, aren't) в предложения, ориентируясь на подлежащее и контекст.
- Ann isn't a doctor. She is a student.
- Manos is a student. He is a doctor.
- Carl and Ricardo are fifteen. They are thirteen.
- Helen and Mitsuko are students. They are teachers.
- Mitsuko is ten. She is twenty-five.
- Ann, Carl and Ricardo are teachers. They are students.
- Ann and Helen are French. They are English.
- Ricardo is English. He is Brazilian.
- Helen and Mitsuko are thirteen years old. They are twenty-five.
- Carl is Greek. He is German.
Ответ: isn't, is, are, are, is, are, are, is, are, is.