2. Is Helen in class 4B? - No, she is not/ Yes, she is
3. Are Tanya and Helen friends? - No, they are not/ Yes, they are
4. Are they from Belarus?- No, they are not/ yes, they are
5. Is Mr Franklin a teacher? - No, he is not/ Yes, he is
6. Are the pupils in the class nice? - No, they are not/ Yes, they are
.....
В общем, я не знаю можно писать отрицание или же только утверждение, поэтому где "No" - отрицание, а где "Yes"- утверждение. Выбирай сам(а) ^-^