Complete the sentences with the Past Continous froms of the verbs in brackets.

Alexader Graham Bell was experimenting (experiment) in his laboratory when he made the first successful telephone call.
1. ..... (Archimedes/have) a bath when he shouted "Eureka"!
2. Mark Zuckerberg ..... (study) at Harvard University when he created Facebook.
3. ..... (Isaac Newton/sit) under an apple tree when he thougt of his theory of gravity?
4. Marie Curie ..... (not/live) in Poland when she won her first Nobel prize in 1903.
5. Art Fry created Post-it-notes when he ..... (work) for 3M.
6. George and Diane ..... (visit) a school when terrorists attacked the World Trade Center.