Вставьте правильную форму глагола to be ( am , is are ) 1 , His elder brother ....... Kind and intelligent 2. Do you

1. His elder brother is kind and intelligent 2. Do you know where your friends are? 3. Knowledge is important. 4. Where are your sisters and brothers? 5. Jack is the most interesting person l have ever met. 6. Whose music is the most popular? 7. What date is it today? 8. I am interested in economics but my friend isn\'t.