7. Ben says that when he was a student, maths....his least favourite subject. A. were B. has been C. was

The correct answer is C. was. The sentence means that Ben says that when he was a student, maths was his least favourite subject. Правильный ответ: C. was. Предложение означает, что Бен говорит, что когда он был студентом, математика была его наименее любимым предметом.