К предложениям задать специальный и альтернативный вопросы.

3. Frida collected discs in childhood.
What did Frida collect?
When did Frida collect discs?
Did Frida collect discs o stamps in her childhood?

4. My parents have been to London.
Where have your parents been?
Why have your parents been to London?
Have your parents been to London or to Paris?