Choose the correct answer. ... you ever (to be) to Africa?

{ "explanation": "The question requires us to choose the correct form of the verb 'to be' in the present perfect tense. The correct form for asking a question about someone's experience is 'Have ... been'.", "correct_answer": "Have ... been", "translation": "Необходимо выбрать правильную форму глагола 'to be' во времени Present Perfect. Правильная форма для вопроса о чьем-то опыте - 'Have ... been'.", "russian_answer": "Правильный ответ: Have ... been" }