Задайте вопросы к предложению It is usual for close friends to have similar idea. (вопросы должны быть на английском)

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Is it usual to have similar idea for close friends?Is it usual to have similar idea for close friends or teachers?It is usual to have similar idea for close friends, isn't it?What is usual for close friends?Whom is it usual to have similar idea for?What idea is it usual to have for close friends?