Verified answer

Fred and Sam are good at English.

1.       Общий вопрос.

Are Fred and Sam good at English?

2.       Разделительный вопрос.

Fred and Sam are good at English, aren`t they7

3.       Специальный вопрос.

Why are Fred and Sam good at English?

4.       Вопрос с or (или).

Are Fred and Sam good at English or at German?

5.       Вопрос со словом Who.

Who is good at English?