many students study at our institute this years

Общий:

Do many students study at our institute this year?

Специальный:

Why do many students study at our institute this year?

К подлежащему:

Who studies at our institute this year?

Альтернативный:

Do many students study at our institute or at school this year?

Разделительный:

Мany students study at our institute this year, don't they?