Qual a invenção da segunda fase da revolução industrial?

A. Computador
B. Máquina a vapor
C. Motor de explosão
D. Satélite

Used to +Infinitive exercise
Make an affirmative sentence, negative sentence or question using "Used to +Infinitive"
1. i / live in a flat when i was a child
2. We/go to the beach every summer
3. She /love eating chocolate, but now She hates it
4.He /not /smoke
5. I/ play tennis when i was at school
6.She/be able to speak French, but She has forgotten it all
7.He /play golf every weekend?
8. They both / have short hair
9.Julie /study portuguese
10. I/ not / hate school

O sangue rico em oxigénio entra no coração através de??