Put the verbs in brackets in the correct form(past simple or past continuous tense).
1.When I came home my mom ... dinner for us.( to cook)
2."What ... you ... about?" ( to talk) -"Nothing serious"
3.I'm sorry I couldn't join you yesterday. I ... for my exam. ( to prepare)
4. What ... you ... at a minute ago? ( to laugh) - It was the funniest joke l've ever heard.
5.The spaceship cartain ... the satellite which ... very fast.(to notice/ to move ) It was dangerous!